kk, if you say its quite low, i will do 7ml, but im using 35% so i lowered it slightly. i will do it tonight, im not saying that h2o2 is harmful to my plants, all im saying is that my last grow i introduced it @2.5ml/g, and within 10 hours my plants were seriously droopy, droopy to the point that some branches fell over and all leaves looked like they had wilt... i had colas laying on my scrog screen, and it looked so bad i didnt take any more pictures of my grow til i was hanging buds up. then i read some people that use 2-5 drops of 35% h2o2 for maintenance in their dwc res.
How many ml in a "drop"?
Applying H2O2 directly to a rez where roots are in the solution could have been part of the problem, but this much I'll tell ya- 2.5ml/gal of 35% is about half the efficacious rate for sterilising solutions and would have barely had an effect on microbes, let alone cannabis plants.
being that i cant find any literature done by universities or such with implicit instructions of using h2o2 it is difficult for me to pour the shit in based off of peoples recommendation. my res runs@65F constantly, i probably have very little to worry about as my res's are very well oxygenated, but im looking for solutions in the near future when i begin growing 10kw+.
I take my information mainly from reliable sources such as university studies as well. If you look around on the web a bit, you will find such data. In a quick search, I found this slide presentation on Greenhouse & Nursery Sanitation from Colorado State U:
http://ghex.colostate.edu/presentations/Greenhouse_and_Nursery_Sanitation.pdf (see page 55):
Hydrogen peroxide
– H2O2
• Strong oxidizer
– Sold from 3-90%
– 3% as a wound cleaner
– 90% for rocket fuel
• ZeroTol (hydrogen dioxide)
– Contaminated water
• 1:500 dilution
• 540 ppm H2O2
– Clean water
• 1:10,000 dilution
• 27 ppm H2O2
For 35% H2O2, 2.7ml in 1 gallon H2O = 250ppm; 5.4ml/gal = 500ppm.
Hello DR. AL B Fuct, i just want to say thank you for all your posts. i stay up late every night reading your posts. Just to let you know, i'm trying to do thing the way you would. My system is a 1000w light system ,blockbuster hood, 40gal rez, 4x4 tent,16pots ,with hydroton, two fans one on the light the other on the filter. just two question, would you use a co2 tank with this setup, and question two, would it be better to grow as a sog or scrog with DNA chocolope? with the 4x4 table i can get around 49 seven inch pots on the table what should i do to get a large amount.
I don't know what a "blockbuster hood" is. A 1000 will do very well over a 4'x4' tray- I'd use a 1000 over as much as 20 sq ft. You'll get very good results with the SoG method. I'm not a fan of SCRoG- it's a method intended for a small number of plants and there's some veg time involved. SoG doesn't require any vegging time, no farting around with tying stems down to screens or nets and has much better air circ than SCRoG, with the associated lower potential for mould. Just keep after pruning off the branching in SoG and it'll work well.
Using CO2 is very expensive and requires a grow room specifically built for it, but can be worth your while if you're willing to part with the cash and do the work. To make the best use of CO2, automated control systems which sense the CO2 concentration in the room atmosphere and apply more gas as required are preferred. Application systems which also control fans and aircon are better yet. Mind you, you can easily chuck thousands of dollars into such controllers and you'll have the ongoing expense of CO2 tank rental and hassle of lugging the heavy cylinders around. Combustion based CO2 gens can be used if you have a very large op, but the heat they generate makes them impractical for very small ops like yours.
I don't think I'd recommend Chocolope for SoG. It's a sativa dominant hybrid which has a tendency to get tall. Look around for an indica dominant hybrid instead.
added 6ml/g of h2o2 to my flower soup and about to pump it back in.
Should be fine. Let me know how you go.
WOW, that was all very useful information Al, thanks
I am new and have been absorbing all the information I could here for the last few months and have found it quite conflicting, there is alot of great information but one has to read it all and try to decipher the good from the bullshit, you made it a little easier.
It is nice to hear input from a real world grow vet!
Thanks much for your confidence and compliments.
