Roseman's DIY Bubbleponics Tutorial

Jarren

Member
This is the 1st 29 page thread I have EVER read all the way through. Thanks! Adding rep now.
Roseman, you are good at what you do.....and, I noticed that you mentioned Filthy.....he's taught me as well...always having an ear to hear for a newbiew..you are appreciated!!
 

Roseman

Elite Rolling Society
I just took some new pics.
I moved them closer together to share the lights.

I LST, Low Stress Trained, the biggest one in the bucket, and had it leaning over much farther, and had it tied over. But this evening, I am 90% sure I saw some male pre-flowers on it. I 'll go over Male-female later, but let me tell you here, the fastest growing tallest one is always a male, if you plant a few seed. I was just too tired to worry about it this evening. I did untie it until I am sure.







See the plastic trash bag hanging on the door with a collection of dead leaves in it. They are not good for anything worthwhile.











This is the tank one week behind the other, but I have been stretching it and it is almost as tall as the other tank. I'll pull it out of the end of the closet soon.


 

Attachments

MostlyCrazy

New Member
Beautiful, bushy big ass Plants! Too bad on the possible male but we know how it goes! It's hard not to get attached to the plant's but I never get attached to the big one. You just know it's trouble.

Nice example of normal leaf drops. The bag says it all!
 
I have the bubbleponics system all setup with clones. How often do you have to water? I've seen one minute every three hours to leave it on all the time. Does anyone have a general rule of thumb when it comes to watering schedules?
 

MostlyCrazy

New Member
I have the bubbleponics system all setup with clones. How often do you have to water? I've seen one minute every three hours to leave it on all the time. Does anyone have a general rule of thumb when it comes to watering schedules?
You need to read the direction that come with the kit again but the short answer is the the water pump feed the irrigation hub which feeds the feeder hoses and it's left on 24/7. Your thinking of an ebb and flow watering plan. Tha bubbleponics system is sort of an advanced DWC system designed for new growers.
 

DW4174

Well-Known Member
Wow look at them bushes!!!!! Its a all around jungle in there.

I cant wait to see the yeild!
 

Roseman

Elite Rolling Society
I will go over SEXing (determining sex) when or after I start the 12/12 Bloom or Flowering Cycle. (12 hours of darkness, 12 hours of light) let me say here that introducing the BLOOM nutes is NOT what starts the flowering process.
It is the change in the LIGHT Cycle. Naturally, outdoors, when the days or daylight starts getting shorter, about late June, the plant is alerted to its days are growing shorter and fewer. It knows then it is time to start the reproduction period, and it does it by making male and female plants, that have sex or the male flower polinates the female flower, and seeds are made.

Most new growers determine sex about ten days, sometimes up to 14 days after starting 12/12 by actually seeing the male and female flowers. By changing the light cycle from light 24 hours a day, to light 12 hours a day, we "force flowering". I will show pics later of what those flowers look like.
But very experienced growers can determine sex during the 4th to 6th week of Vegging by observing the "pre-flowers". Some old timers even claim to be able to determine sex by smell and appearance. I can not do that, i am not sure it is even true. But I have learned that 90% of the time, not always, but most of the time, the male is the tallest, fastest growing plant of the two genders. And I have learned to look for "pre=flowers". My eyes are not as sharp as they used to be, and the male pre-flowers are easier for me to see. They appear betwen the 4th and 5th week of Vegging and look like spikes, or spears to me.

Here is a pic of pre-flowers.





Maybe I don't have a male, hmmmmm.

Male pre-flowers look like little crab claws to me.
 

Roseman

Elite Rolling Society
Let me disuss a few problems you might encounter and offer a few solutions.


Roseman's Tips, Tricks and Troubleshooting Guide, Revised 10-1-09

Reading the Instructions
Every time I hear, read or receive a complaint about a problem with the Bubbleponics System, it was because the person did not read and fully understand all of the instructions, or they did not understand what the system is all about. This TIPS, TRICKS and TROUBLESHOOTING GUIDE should answer and help you with just about any problem you might encounter.


Keeping Size in Perspective
This system was not designed to grow six 6-foot tall Christmas Trees. (Although I have grown 4 plants, 3, 4 and 5 feet tall in one tank.) I have heard a few growers tell us "I just realized that the 6 plants are going to get very crowded after they get 3 or 4 feet tall". This system was not designed for 6 giant plants. There is a reason that the tank is 21 and a half inches long. When this system was originally designed, many factors went into deciding what size tank and size pumps to use. The main factors were economy, costs, simplicity, stealthness, and making sure the tank would fit into the end of a small closet, out of the way and out of sight. I've heard of a few growers that try to change to a much larger tank, and realize how much more work and trouble is involved in using a larger tank and moving larger quantities of water. Draining and replenishing the water can be a major task in a much larger tank. Not only are more larger and expensive air and water pumps needed for a larger tank, but larger pumps make more noise. Draining and cleaning a larger tank is a ton of work and trouble too. If you want to go with a bigger system, then connect two tanks together. And if you want to grow large plants, then start them in the Bubbleponics System, then transfer them into the Bucketeer Large Bucket DWC system. Or do like most growers do and just grow 2 or 3 large plants in one tank by selecting and keeping the more desirable three plants and disposing of the other three. I start 6 seeds and always get three males and three females, so it works out just fine. Those empty holes make it easier to service the inside ane take water samples and pour water back in it.

Growing the Stealth Hydro Way
The StealthHydro Bubbleponics System was designed to be "stealth" and to be very efficient, quiet, small, simple, easy to use, and inexpensive. The designer of this system had the beginner or novice in mind, because it is so simple and easy to use. But as we have continued to grow with the system and grow in experience, we've come to know you can not improve on it. The system is designed to grow six small plants very fast and easy, under the umbrella of two Dual Spectrum lights, in a two square foot space.

Dirty Water?
We hear from a few growers having trouble with the water becoming cloudy or brown. Upon asking questions, we learn they did not rinse the hydroton rocks as completely as they should have. You should put the hydroton rocks in a large mixing bowl full of water, and pour them through a colander five or six times until the water pours out crystal clear and clean of hydroton dust. You should also pour water over and through the rocks several times in the colander.

Algae Prevention
We also hear from a few growers allowing algae to grow in their tank and becoming a problem. This can happen from several mistakes but can easily be remedied. (see our 8 Step Remedy) You can not allow a dead root or fallen leaf to stay in the tank and decay. It will really riun the pH balance. You can not allow the lights to shine into the water through the rocks. That is why I use cup covers. If the grow cup is full of rocks and covered, the lights can not penetrate through the cups. And most important, you have to start with clean, pure water. You can not use rain water, or water from a stream, river or lake. You should exchange the water after the first ten days, and then every 10 days as you grow. As the plants get over 12 inches tall, exchanging the water every 7 days is more efficient. Your water should smell like clean green alfalfa sprouts or fresh lettuce. With added GROW nutrients, it has a slightly green tint. If you detect an unpleasant odor, you have waited too long to drain and exchange the water. When you do replenish the water and nutrients, you should look for and remove any dead roots that were accidentally torn from the plant. You can use chlorinated city tap water. Some growers even recommend it for it's purity and to prevent algae. The chlorine dissipates fast and is never a problem. You can use RH filtered water, or store bought distilled or spring water. If you use well water or detect algae growing in your tank, you can add 1 teaspoon of 3% Hydrogen Peroxide per gallon of water to your tank as a preventative or 2 full teaspoons per gallon as a cure. Never use more than 2 level teaspoons per gallon of water.

We have seen books that advised allowing chlorinated water to first sit for 24 hours. Not only is this not necessary, this is bad advise, and encourages algae to start growing in your water. We have done tests and the chlorine dissipate within minutes from the tap. Do not use water that sat out uncovered or was stored a long period of time.
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pH Problems
If you have a PH problem, you simply did something wrong. You should make sure that the PH of the water going into the tank is very close to 6.0. Pure water will test at 7.0 pH. Impurities or additives will raise or lower the pH of water. Anything between 5.6 and 6.8 is OK for your growing, but 6.0 works best. When you first set up your tank, you should do a PH test on your water before adding the water to the tank, using the enclosed PH test strips or a pH meter. Then adjust the water with PH UP or PH DOWN before it goes into the tank. That way, the PH perfect nutrients will work best. It can be dangerous to adjust the PH in the tank, especially if you overly adjust it. It is also dangerous to adjust it frequently. A very slight adjustment is OK, but if you change it drastically in the tank by using a large amount of PH UP or PH DOWN, you are taking a big risk of seriously harming your plants. If you do a test on your tank's water and it is extremely out of range from 5.8 to 6.8, then it is best to drain it and replenish it with PH corrected water and nutrients. (see the 8 Step Remedy) Let me repeat, you should add the nutrients to PH perfect water to start with. If you insist on adjusting it in the tank slightly, then use no more than 1/2 level teaspoon of PH UP or PH DOWN diluted in a quart of water to the tank, and no more frequently than 4 hours apart. Plants do not adjust well to rapid changes in PH levels. The results can be Nutritional Lockout. Remember, if you make a mistake then you can easily and rapidly correct it, by using the 8 Step Remedy.

Mixing the Nutrients
We have had growers tell us "when I throw in a packet of nutrients into my tank, they just settle to the bottom and don't dissolve". That is not the proper way to introduce the nutrients and feed your plants. These nutrients contain some natural elements and not made to perfectly dissolve in water. There are aded pH buffers that do not readily disolve. For example, seashells and bone meal are not ever going to completely dissolve in water, no matter how much they are pulverized, but are an excellent source of calcium. You should add the packets to a quart jar half full of luke warm water and stir them rapidly, mixing them as well as possible in the water. Then pour them through a tea strainer or some kind of mesh screen or filter, to filter out the small particles that did not dissolve. You can crush those undisolved nutes in the tea strainer and should still use them. Then add the nutrient water mix to the tank.

Always remember when you first start and set up your system, you should start with 1/4 of a packet of GROW and Micro nutes, if you are starting with seeds, sprouts or baby seedlings. If you started with clones or baby plants, then start with half a packet of Grow nutes. Your plants should be about 3 to 4 inches tall, with three full nodes, before you use the nutrients full strength. Then stand back and watch for a growth explosion!

Nutrient and Water Flow
We hear concerns from new growers that the water is not flowing rapidly or strongly from the ends of the tubes into the rockwool cubes. A strong flow is not necessary or desirable at all. A slight trickle (bubbling) is all that is needed to keep the rockwool cube moist and the baby roots fed until they reach into the deep water. You do need to occasionally check for crimps and folds in the water tubes, especially when you first set up your system.

Keeping It Simple
The biggest mistake that I have seen anyone make starts with "I wonder what will happen if I add miracle nutrients, or cat urine, or molasses" or a dozen other crazy things that I have heard growers try. If you do not know what will happen, don't try it unless you are prepared to start all over because you killed your plants. Experimentation is great, but caution and moderation are the keys to success.

Oxygen Is the Most Important Aspect of Bubbleponics
The best tip we can offer from experience is the importance of air or oxygen in the water. It is not required or necessary for good health of plants, but the addition of a 2nd air stone can make a difference in the speed of growth. You can use a plastic T-coupler so you can add a second stone to the one air pump. You can force growth spurts by draining the tank, waiting five or ten minutes to allow the roots to "air out" and then replenishing the water, even if you add back the same water and nutrient mix that you just drained out. Try it!

There are several ways to drain your tank by the way. One is by adding the drain plug or faucet. Or you can obtain a plastic hose like you can get at the aquarium store to drain your aquarium, and siphon the water out. Another way is to attach the hose to the submersible pump, using your fist as a coupling, and simply allow the pump to pump it out into a bucket.


Diagnosis and Recuperation Guide

We'll discuss some signs of illness first, then offer remedies for Recuperation and Recovery.

Both new leaves and mature leaves are the best indicators to determine how healthy your plants are. Any problem or illness will first manifest itself in the appearance of your upper leaves. These problems almost always originate from the plant's environment, PH imbalance or over-feeding or under feeding. These problems always result in what is called "nutritional lock-out".

Nutritional Lockout
Allow me to GIVE you a simplified definition of NUTRIONAL LOCKOUT.

Can you imagine sitting a plate before a child at dinner time, with his most favorite food, hot dogs, ketchup and french fries? But also on the plate is a major portion of steamed broccoli, which he is just not fond of and insists on nibbling on. Now imagine telling that child, "you can not eat the hot dog and fries if you do not eat all the broccoli too". NUTRITIONAL LOCKOUT is when the child responds with "well then, I just won't eat!"

Stealth-Hydro's nutrients are both nutritionally and PH balanced. But after being in your tank for 5 or 6 days, and being eaten from for 5 or 6 days, they become imbalanced. Perhaps you are growing plants that ate all the nitrogen first and just snacked around the iron, magnesium and calcium, or visa versa. The results are discoloration in the leaves, yellowing or rust spots, or curling of leaf tips. It also becomes apparent when your plants were consuming a half gallon or gallon of water every day, and then suddenly when you check the levels the next day, they did not drink any water at all. This is NUTRITIONAL LOCKOUT.

Instead of giving lengthy descriptions of indications of overfeeding, underfeeding, ph imbalance, environmental problems and Nutritional Lockout here, it is easier to just give the remedy. Here we will refer to this remedy as THE 8 Step RECUPERATION AND RECOVERY REMEDY.


THE 8 STEP RECUPERATION AND RECOVERY REMEDY

1. Check the roots. If they are discolored, reddish or brown, or present an unpleasant odor, you have a problem. If they are weak, soft or mushy, you have a problem. Also while checking the roots, observe the temperature of the water. If it is warmer than "luke warm" you have a problem. This problem is probably what is referred to as "root rot" or a disease known as PYTHIUM. Remove the dead brown roots by trimming them away with sharp scissors. Do not leave them in the tank. 2 teaspoons of 3% Peroxide per gallon of water will cure them in a few days.
2. Check the humidity and temperature of the grow area below the lights in the "growing zone" when the lights are on. A temperature of above 87 degrees or below 67 degrees will slow growth, but it is not a serious problem that will kill your plants. Temperatures below 62 degrees or above 92 degrees will stop growth. An extremely constant high temperature in the upper 90s or below 58 degrees can slowly result in death of your plants. The most efficient temps for growth are between 72 to 84 degrees. Any Humidity between 40 and 60 percent is acceptable and desirable for the Veg Cycle. You need lower humidity for the BLOOM cycle. .
3. Check the "lights off, nighttime" temperature. Most desirable is ten to 15 degrees cooler than the daytime "lights on" temperature, averaging 66 to 72 degrees.
4. Check the distance between the tips of the plant and the tip of the light bulb. If you observe yellowing or leaf curling tips, then move the lights one inch further away. A good rule of thumb if you use HID lights, is hold the soft palm of your hand at the leaf tip and see if the bulb is too warm to your hand. If you use compact fluorescent bulbs, I recommend a distance of two or three inches for the 65 and 85 watt bulbs and 4 inches to five inches for the 105 watt bulbs. More mature plants can handle the bulbs slightly closer.
5. Check the position of your fans. Air movement is very necessary for the health of your plants, but too strong of a fan can cause wind burn. Direct your fan toward the tops of the plants and toward the lights. Never position the fan blowing strongly downward on the leaves. If you have varible speeds, use the SLOW speed.
6. Add 2 teaspoons of hydrogen peroxide to a quart of water per gallon, and add it to the tank of six gallons already in the tank. Wait ten minutes and then turn the water and nutrition solution pump off to prepare to drain the tank. Poor at least a cup of clean pH balanced water through each grow cup, onto each rockwool cube and through the hydroton rocks.
7.Drain or pump the tank empty as possible without damaging the pump by running it dry. Add two gallons of additional clean water with 1 teaspoon of hydrogen peroxide again and then drain it away too. Again, empty the tank as empty as possible without burning up your pump.
8. Add fresh PH balanced water and nutritional packets as prescribed. PH test it again.

The above 8 steps should repair and remedy any health problems that your plants experienced within the next two or three days. Now is the time to try and determine what caused the problem to start with, by investigating and researching typical hydroponics problems and illnesses. Here are a few DIAGNOSIS TIPS.


Typical Hydroponics Problems and Illnesses

Underfeeding and Weak Nutrition
The entire plant, both upper and lower leaves, will show lime or light green in color.
The plant will not eat, drink or show growth.
It is time to follow the 8 Step Remedy.

Overfeeding, Use of Too Strong Nutrients
The leaves will curl downward. They grow very dark dull flat green and then the tips show signs of burn and yellow.
It is time to follow the 8 Step Remedy.

Nutritional Lockout
You know that you have made recent PH adjustments. You might know you may have used too much of the PH Adjustment Solution. You may have failed to test the PH often enough. You notice the plants did not eat or drink because they did not consume the same amount of water they used yesterday. You see rust spots. The large lower leaves are prematurely dying and you are not in the BLOOMING or FLOWERING stage.
It is time to follow the 8 Step Remedy.

Wind Burn
You had the fan blowing downward toward the upper side of the leaves, instead of blowing up through the node spaces or toward the lights. You observe the leaves becoming dry or even crispy, perhaps shriveling, and the tips curling upward. The leaves do not appear glossy, moist and vibrant.
It is time to follow the 8 Step Remedy.

Water, Nutrition Solution or Roots Are Discolored Brown Or Have an Unpleasant Odor
You notice your water is becoming brownish in color, or smells distasteful. Your solution does not smell pleasant and appetizing like fresh lettuce. Your roots are not the same shade of white that they once were a week ago.
It is time to follow the 8 Step Remedy.
 

Roseman

Elite Rolling Society
HOW DO I DEAL WITH ALGAE BUILD UP IN MY HYDROPONIC SYSTEM?
Answer: The best method is prevention. If you keep the solution away from light, i.e. keep the lids closed and all openings sealed, and sue cup covers, you can prevent algae from growing. ALGAE HAS TO HAVE LIGHT, TO GROW.
If you already have algae in the system you can remove it with a SCRUB-brush, or use hydrogen peroxide (3ml or two teaspoons of 3% H2O2 per gallon of solution) to remove it. If there are particles floating in the nutrient solution, be sure to flush the reservoir and growing chamber with ample water, and then start with a new batch of nutrient and pH balanced water. If the problem is severe, make sure you have the algae completely flushed out to avoid the risk of clogging some of the flow lines in the system.
After you use the peroxide, refill the tank with clean water and DRAIN AND REPLINISH AGAIN to rinse it good.
Some info says peroxide will not help or work, and will kill the plants like it kills the algae. Use common sense and don't flood the plants with peroxide, and rinse the tank throughly.


All hydroponic growers know what algae looks like - it is often green, but can be brown, reddish or black, it clings to channels, gullies or pumps or oozes over the top of damp media. Algae often has an 'earthy' or 'mouldy' smell, is slimey, or gooey, particularly when large numbers are decomposing in the nutrient. It has the ability to block drippers, emitters, pumps, return channels, and heavy infestations can actually 'seal' off the surface of the media or substrate. It can ruin a pump or stop up a feeder tube in DRIP or BUBBLEPONICS SYSTEMS.

The problem with algae, apart from the appearance and smell problems it creates, is not so much that it uses up nutrients from the solution, but as it blooms, dies and decomposes, it removes dissolved oxygen from the hydroponic system. This increases the biological oxygen demand (BOD) on the system and the plant's roots may suffocate from a lack of O2. Decomposing algae may also release toxins as it breaks down and provides a food source for plant pathogenic fungi which may then multiply to high levels in the system. Algae on plant root systems can suffocate the roots, making the plants prone to attack by opportunist pathogens such as Pythium.
Algae, is a form of plant life, it is a natural consequence of exposing water with nutrients dissolved in it to a light source. Where there is no light, algae can not grow, so the most obvious solution to preventing algae growth is to stop light from reaching the nutrient solution where ever possible. Cups should have light proof covers, return gullies also need covers, large media beds can also be covered with either plastic film or a layer of substrate which is designed to act as a 'dry mulch' since algae can not grow on dry surfaces. In aeroponic systems, the root chamber must be light proof and media based pot or container systems can have plastic or rigid collars made which cover the surface of the media.
Control of algae, once in a hydroponic system can be difficult - some DWC growers tolerate small amounts of algae in the system, provided it does not become excessive and this usually causes no problems. Where algae growth has become thick and widespread, often the best option is to clean up the whole system after crop removal and start again with a clean system.
Some growers add algicide products into the nutrient to kill off algae and there are a number of these products on the market. However, since any product which kills algae, a form of plant life, can also damage young or sensitive root systems, care must be taken with the dose and damage has been known to occur. Algae will also regrow, very quickly after applications of most algaecide products, requiring more and more of the chemical to get good control. In a study carried out in Belgium on Algae control in hydroponic systems, it was found that many of the products tested for control of algae in nutrient solutions (Diazinon, Endosulfan, Propiconazole, Thiram, Ziram, Quinomanid, Hygrozyme, Irgarol-1051, SM-90, ) were either totally ineffective in killing algae, or killed off much of the algae but were also very phytotoxic to the plants and causes considerable root damage. Plus the play havoc witht eh pH. It was also found that dose levels of 50ppm of hydrogen peroxide was requited to control algae, but that this dose was too phytotoxic for young plants, although older plants survived this dose rate. Therefore, careful and selective use of H2O2 could be used on older, more resistant plants, but since H2O2 is a 'biocide' rather than an 'algicide' there is always a risk of root damage.
Other studies have found 'organic' algae control methods such as adding certain 'grapefruit seed extracts' to the nutrient will kill algae without harming the plants - this is a method used in drinking water, fish ponds, lakes etc and appears to work well. There could be the potential, in larger hydroponic tanks to use 'Barley straw rafts' as a means of algae control as has been proven to work in ponds, lakes and other water ways.
However the best method of algae control will still always be prevention of the problem, so excluding light should be the main emphasis in systems with algae problems.


Let's look at what Ed Rosenthal says about peroxide.

I found this article very interesting. It was written by Ed Rosenthal. I see a lot of mis-information about peroxide, and debate too, so I wanted to show you what he says.

by Ed Rosenthal.
How much hydrogen peroxide should be used?


When and how much hydrogen peroxide should I use in my hydroponic solution?

Hydrogen peroxide is a powerful oxidizer that can be used to destroy fungi, molds, bacteria and other infectious agents as well as some pollutants. Adding it to your water helps plants by destroying infectious agents and by adding oxygen to the roots' environment.
Hydrogen peroxide is an essential ingredient in maintaining a clean growing room. It replaces chlorine bleach, which is antiseptic but harmful to breathe. When added to reservoirs, hydrogen peroxide slows the growth of algae and other water organisms so that trays and utensils need to be cleaned less frequently. Soil and water borne diseases such as pythium and other stem and root rots occur at much lower rates in hydrogen peroxide-enriched water. Hydrogen peroxide works because of the oxidative reaction, so micro-organisms are unlikely to develop a tolerance.
There are many ways to add hydrogen peroxide to the water. A measured amount every three days is the crudest method, but still effectively enriches the water. A smaller measured amount daily would even out the peaks and valleys of oxygen in the water. Another method is to use a drip similar to an IV bag, which continuously adds a regulated amount. The most sophisticated method is a probe which measures the oxygen content of the water as an indirect means of measuring the hydrogen peroxide, and adds an appropriate amount as needed.
When used properly, hydrogen peroxide can keep infections in the garden to a minimum and stimulate root growth by increasing the oxygen content of the water. Hydrogen peroxide degrades into free oxygen and water over a three-day period. Some of the oxygen dissolves in the reservoir water and is used by the roots.
Different concentrations of hydrogen peroxide solution are available. It is sold diluted to 3% in drug stores. Some indoor garden shops sell 10% grade and 35% grade is sold in a few health food stores and over the Internet. The 3% hydrogen peroxide solution can be used topically to sterilize cuts and infections. Hydrogen peroxide solution at 10% burns skin. 35% hydrogen peroxide solution acts much like a concentrated acid and is handled as a hazardous, corrosive liquid.
The 10% hydrogen peroxide solution is sometimes used at rates as low as one ounce per 10 gallons water; however, enrichment using an ounce per gallon is more effective for disease control. When 35% hydrogen peroxide solution is used, it can be added at the rate of three ounces per 10 gallons of water. If a 3% solution is used, use three ounces per gallon of water as a cure.
 

Roseman

Elite Rolling Society
Pythium, Roor Rot
https://www.rollitup.org/dwc-bubbleponics/7897-stealth-hydro-bubbleponics-systems-96.html#post1606026

Thick, fat, white furry roots are what you most want to see - they are absolutely indicative of healthy root growth. Be aware however that the color of a nutrient solution will stain the roots, turning them yellow or brown. This is also true of many nutrient additives. Older, more mature plants will have a darker cream-colored root system, and some plants just tend to have a natural cream colored color pigment. My Bloom nutes stain the roots pink.

Root Zone Temperature
The temperature of the root zone and the temperature of the nutrient water solution can have a major effect on the healthy growth and appearance of the root system. In general the temperature should be between 68 and 72 degrees farenheit. Anywhere between 64 and 80 will be OK. Colder or warmer conditions can cause poor and stunted root growth, as the roots don't want to grow into the unhospitable nutrient solution. Major root death can occur in even brief periods of cold or heat stress. Poor temperature conditions leave the door open to root disease.

Some would argue that one of the strengths of hydroponics is its sterile environment, and the notion of exposing growing systems to bacterial and fungal organisms would be self-defeating, if not sacrilegious. These growers rely on sterile growing environments, strong disinfectants and a product like SM-90. Another option is Peroxide. Each of these offer their own protection and benefits. But NEITHER SM-90 or Hydrogen Peroxide works well with organic nutes or organic additives in the reservoir. You can not try to kill the organic algae or pythium and add organic materials back. That just won't work!
They do not work well together and SM-90 has also been known to react poorly with Superthrive.
In a sterile growing environment, your goal is to have a super clean reservoir. This is harder than it sounds. Folks who have been growing in the same area with the same equipment for years might find that they are suddenly having root problems when they never had them before. Or a new grower might begin having problems right from the beginning because of his water or temps.
Keeping your reservoir totally sterile can work very well, but once you get a population of icky badness it will keep coming back again and again. Some pathogens such as pythium are almost impossible to get rid of completelely. No matter how many times you sterilize everything with a bleach or peroxide solution, the problem returns. It can get very frustrating and expensive to constanly be battling. More and more innovative growers are moving toward a more wholistic approach of using good microbes in the reservoir with organic nutes or staying with strickly chemical nutes..
One option is to use no organic additives at all and to rely strictly on chemical nutrients based on fertilizer salts. We think a better choice is to continue using organic material, but also using an enzymatic addtive like Hygrozyme that will break down the unwanted organic matter in the reservoir. Let me warn you that SM-90 and Hygrozyme are medicines for very sick plants and are not to be sued lightely or often. One, they wreck pH. Two, you do not want your child to enjoy drinking cough syurp when the child is not even coughing and sick. Same goes for SM-90, Hygrozyme and even Peroxide. Please use them sparingly and only when needed.
The only time to constantly use Peroxide, is when it is impossible to get the temp of the water down, then you can use one teaspoon per gallon of water daily, as a root rot preventative.
and let me add, I have seen many growers say I KILLED MY CROP WITH HYGROZYME OR SM-90.
 

Roseman

Elite Rolling Society
PLANT MOISTURE STRESS - Symptoms and Solutions
Quite often I hear groans from folks having leaf problems -> “Help, my leaves are cupping and the leaf edges are turning brown!”, or, “My plant's leaf tips are curling down and turning black ....what's wrong?” Unless insect damage has occurred or the plant is suffering from a severe case of calcium deficiency, the plant is trying to tell you that it is water stressed. It's hard to tell *exactly* what the culprit is, and unfortunately the “solution” the grower chooses many times is not the right one. A mis-diagnosis only serves to make matters worse by promoting further decline. I’ll try to cover some of the more common causes that can induce these common symptoms and try to offer a few simple solutions. The ultimate and correct solution is in the hands of the grower.

1. Over-fertilizing - the most common cause of leaf cupping aka leaf margin rolling, leaf margin burn, and leaf tip curl/burn is the overzealous use of too much plant food in relationship to factors such as plant size, vigor and rate of growth. The first unit of a plant to show moisture stress is the leaf at its margins and/or tips, reflected by margin rolling (cupping) or burning. Sometimes copper colored necrotic spots show in the leaf also. A hard, crispy feel to the leaf frequently occurs as well, as opposed to a soft and cool feel of a happy leaf. When you have a high concentration of salts in solution (or in the root medium) compared to lower salinity levels found in the plant’s tissue, water is actually drawn out of the plant across the root gradient in order to fix the ppm imbalance. IOW, this is a natural, osmotic response that serves to equalize salinity levels on both sides of the root’s epidermal gradient. Back off on the amount and/or frequency of plant food. Too much plant food can also burn the roots, especially the sensitive root tips and hairs, which then creates another set of problems such as nutrient deficiencies. A note for the bio folks - as soil dries, the concentration of the remaining salts rises further exacerbating the problem. Leach (flush) your pots once in a while to get rid of excess salts.

2. High Heat - the plant is losing water via it’s leaves faster than what can be replaced by the root system. The leaf responds by leaf margin cupping or rolling (up or down) in order to conserve moisture. A good example is reflected by the appearance of broad-bladed turf grass on a hot summer day, high noon, with low soil moisture levels - the leaf blade will roll in and the grass will take on a dull, greyish-green appearance. Upon sunrise when moisture levels have returned to normal, the leaf blade will be flat. Lower the heat and concentrate on developing a large, robust root system by practicing sound plant culture. An efficient and effective root system will go a long way to prevent heat induced leaf dessication and leaf margin curling by supplying sufficient moisture for good plant health. One short episode of high heat is enough to permanently destroy leaf tissue and cause a general decline in the leaves affected, which often occurs to leaves found at the top of the plant located near HID lamps. The damaged leaf (usually) does not recover, no matter what you do. Bummer in the summer. One can only look to new growth for indications that the problem has been corrected.

3. High Light - yes, it’s true, you can give our faves too much light. Cannabis does not receive full sun from sunrise to sunset in its natural state. It is shaded or given reduced light levels because of adjacent plant material, cloudy conditions, rain, debris and dust collection on the leaf surface, twilight periods of early morning and late afternoon, and light intensity changes caused by a change in the seasons. Too much light mainly serves to bleach out and destroy chlorophyll as opposed to causing leaf cupping, but it often goes hand-in-hand with high heat for indoor growers. Again, back off on the light and concentrate on developing/maintaining an efficient and robust root system. Keep in mind that all but equatorial material receive less light during flowering than during the vegetative stage.

4. Overwatering - this practice only serves to weaken the root system by depriving the roots of proper gas exchange. IOW, the roots are not getting enough oxygen which creates an anerobic condition causing root decline and root rot with the end result showing up as leaf stress, stunted growth, and in severe cases, death. <gasp!> Alot of times folks think the plant is not getting enough plant food (which it can't under such adverse conditions), they add more nutes for a "curative", and just add insult to injury.

5. Underwatering - not only is the plant now stressed due to a low supply of adequate moisture, but carbohydrate production has been greatly compromised (screwed up). Step up the watering frequency, and if need be, organic growers may need to soak the pot from the bottom up until moisture levels reach an even consistency throughout the medium especially with mixes that are heavy in peat. If severe, a little surfactant (liquid Ivory dish soap) added to the drench will help return the organics back to a normal moisture retentive state. If the pot feels light to the lift - it’s time to water. Don’t wait until the soil pulls away from the sides of the pot or leaves droop before you water.


(Contributed by Uncle Ben of RIU)
 
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