I have had this same problem for over a year... HELP!!!!!!

kiddbudd said:
Recirculating Drip system
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Right there is no need to worry about your roots being overwatered because there is enough oxygen in the water not to drown them. Your problem is you temps. Keep the light 4 feet away with a fan blowing on the clones(put fan on timer with lights)remember to lower the light each day until you get to about 18". Using a 600w will make you plants nice and bushy. Your going to need an intake fan and exhaust because of your temps. Check out e-bay for good bargains
 
I agree with supersillybilly with regards to pH. It looks like nutrient lock up. Get the pH down to 5.8, flush and give them a reduced solution of nutrients.
 
supersillybilly said:
Keep temps around 20C or 68F and depending on your hydro setup I would ph at 5.5 - 6
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Could I use a 400w maybe until they flower then change it to 600w when they toughen up a bit. I am growing in a tent so it is hard to keep the temperatures down. Would spraying the foliage in the light hours and and ocillating fan help with direct heat on the plants and also the room temp as a whole? And also may I say, In the few posts that you have made to help me out, You've been more helpful than my local hydro bloke!!!! I'm starting to think he's an awesome salesman and I'm a naive first time grower lol.
 
Are you in DWC?

Why do you think you have root rot? Slimey roots? Cloudy res?

What do you adjust the pH of your solution to and how do you measure it? Does it stay there or do you have to constantly fuss with it?

Your leaves look like they suffer from Ca and Mg deficiencies, probably caused by pH lockout either because of your water or what you are doing or not doing to it.

Switch to RO water and get a cal-mag supplement.
 
kiddbudd said:
Could I use a 400w maybe until they flower then change it to 600w when they toughen up a bit. I am growing in a tent so it is hard to keep the temperatures down. Would spraying the foliage in the light hours and and ocillating fan help with direct heat on the plants and also the room temp as a whole? And also may I say, In the few posts that you have made to help me out, You've been more helpful than my local hydro bloke!!!! I'm starting to think he's an awesome salesman and I'm a naive first time grower lol.
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More light the better. Keep the 600w and you will see the results. Focus on your temps. What about a small A/C unit?
 
supersillybilly said:
Right there is no need to worry about your roots being overwatered because there is enough oxygen in the water not to drown them. Your problem is you temps. Keep the light 4 feet away with a fan blowing on the clones(put fan on timer with lights)remember to lower the light each day until you get to about 18". Using a 600w will make you plants nice and bushy. Your going to need an intake fan and exhaust because of your temps. Check out e-bay for good bargains
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I have an intake and outake. Should I get bigger ones? and I dont think I can push my temps below 25C as I'm in Australia in the middle of summer. Will spraying the leaves with neutral water change its characteristics towards the heat? i.e. Bring the Plants temperature tolerance up?
 
kiddbudd said:
I have an intake and outake. Should I get bigger ones? and I dont think I can push my temps below 25C as I'm in Australia in the middle of summer. Will spraying the leaves with neutral water change its characteristics towards the heat?
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When spraying make sure the fan is on so the leaves do not get burned. I would invest in a small A/C unit.
 
shnkrmn said:
Are you in DWC?

Why do you think you have root rot? Slimey roots? Cloudy res?

What do you adjust the pH of your solution to and how do you measure it? Does it stay there or do you have to constantly fuss with it?

Your leaves look like they suffer from Ca and Mg deficiencies, probably caused by pH lockout either because of your water or what you are doing or not doing to it.

Switch to RO water and get a cal-mag supplement.
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I have brown smelly roots that wont progress into the clay balls from the rockwool cubes. My PH before I even touch it is at 8.0 then I use Ph down to bring it to 5.8-6.0 and to measure it I use a PH tester. I am using a recirculating drip system and when the water is attended to it usually stays quite stable.
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Okay. Your rockwool is too wet then. How often do you water it? And do you have your drippers on a timer that can run for less than 15 minute increments?

I still say, change to RO water and get a cal-mag supplement (you'll need that in RO anyway, because there are no dissolved minerals in it.)
 
shnkrmn said:
Okay. Your rockwool is too wet then. How often do you water it? And do you have your drippers on a timer that can run for less than 15 minute increments?

I still say, change to RO water and get a cal-mag supplement (you'll need that in RO anyway, because there are no dissolved minerals in it.)
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Water is not the main issue here, its defo his temps. Need to sort that before anything
 
just my opinion here but as your trying to fix your problem, dont change to much at once. only do one at a time, cause if you change multiple things at once you dont know what actually helped with your problem.
 
supersillybilly said:
Keep me updated m8
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Will do definitely.... You seem to know your stuff and believe me when I say if this is it.... Which when I think about it the only time I have seen any improvement was when I had a fan in there circulating the air, so I am thinking your pretty spot on. Mate if in a couple of months I am smoking my own batch for the first time ever.... I'll have no-one to thank but yourself! Good Advice man and Thanks again ; )
 
kiddbudd said:
Will do definitely.... You seem to know your stuff and believe me when I say if this is it.... Which when I think about it the only time I have seen any improvement was when I had a fan in there circulating the air, so I am thinking your pretty spot on. Mate if in a couple of months I am smoking my own batch for the first time ever.... I'll have no-one to thank but yourself! Good Advice man and Thanks again ; )
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LOL. Good luck with that.
 
if you want my advice, drop your temps as was said to at least around 28C during lights on, lights off no lower than 17-18C if possible. that should help your leaves stay a bit more green.

now for your dwc system, if you are in a small reservoir you will see greater ph swings, and temperature swings. i prefer to use about 80 liters of water in my res, you do not need RO water, your water should be fine, and you wont need to supplement with cal-mag if you change your water out every 7 days. keep your temps in your res between 16C and 20C, no higher at all or you will risk pathogens, you will probably want to get a cheap aquarium thermometer with a probe you can leave submerged. if you do what i do, and use a beer cooler for your res, your temp issues at the root zone would be minimal, and you would be able to just throw a 3/4 full bottle of frozen water in it, once ever few days depending on where your air pumps draw their air from. i have designed my reservoirs to allow me to quickly pump water in and out by leaving a submersible pump attatched to the floor of the reservoir. this allows me to pump my water out, check the ph/ppm and make adjustments. i also use a submersible pump in the mixing tank for the purpose of pumping the water back into the reservoir, and also mixing my solution to make the whole process faster. i use a 1/2" barb to connect my hoses when i need to pump it in and out of the res. i use a 120 liter cooler for a reservoir, and i fill it with 80 liters. i basically make a mark on the side of my large mixing tote, which i think is around a 160 liter tub, so that way i can just fill it and not have to measure with buckets or anything. taking notes on how much of what solutions you use can help you quickly nute your water week after week. i ph up with tap water sometimes, but if im trying to keep my ppm in a range i will ph up with up solution. dwc is very easy, but you have to keep everything within their tolerances. if you have any questions, feel free to PM me. the best thing i ever did was start using coolers for my reservoir at the suggestion of bb57...

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Don't spray your leaves with the light on. Maybe go with distilled water until you can figure out whats going on with the tap
 
oh also, why dont you post a picture of your system, or at least part of it or something so we can see what you are working with.
 
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