It can sterilize the hydroponic solution, which is backwards from what you want. Also, I noticed that it caused my plants to get really dry. Why is it that people post "tips" such as using epsom salts and hydrogen peroxide (maybe my plants got dry from foliar feeding with epsom salts). Nevertheless, I am flushing and using 0 ppm water then adding 1/4 tsp per gallon of water GH MaxiGro (which equates to 250 ppm nutrient solution) instead of overdoing it. The 400 watt HPS (55,000 lumen) that just arrived, how far off of the plants should I hang it? I know that because of it, I have to deal with 56 per cent humidity because of the AC.

In the right situation the Epsom salt helps plant growth and magnesium deficiencies----the h2o2 helps get more o2 to your plant roots.

If your plants are dried out its not the peroxide unless you went berserk with the stuff,in all likelyhood the epsom salt was the culprit.

IMO there are much better alternitaves to using epsom salt to correct a nute defeciency, like very light foliar feeding with a fertilizer rich in micro nutes.

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My 4 day $40 bud dryer,http://www.rollitup.org/grow-room-de...ml#post2087235My DIY $3 Carbon filter,http://www.rollitup.org/grow-room-de...on-filter.html

i use both and have no problems ,i dont foliar feed ,but it works for me.

where would a guy need to go to buy hydrogen peroxide? what is it labeled as?

don't use h2o2. there are plenty of things that can be used to add air (like an air pump?) or kill algea/bad stuf.

h202 kills beneficial bacteria as well (you know, the kind that lives in a symbiotic relationship with the roots?) kill the bacteria, slow the feeding process. plants will probably live, but you are actually hindering, not helping things.

kp

CVS, Costco, any drug store, really. auhm, it's labeled as 'Hydrogen Peroxide.' Remember the stuff they would pour on your cuts as a kid, and it would bubble and fizz. Usually in a black/brown bottle.

if you add a small amount like 3 teaspoons per gallon it's supposed to increase bud size...

Guy's apply 1 tablespoon per gallon of 'Hydrogen Peroxide. It will increase oxygen levels. If you add to much, yes it can kill off bacteria, but 1 tablespon per gallon works great!

OK, I'm gonna try to clear this up for everyone....here goes, this is straight out of the cervantes indoor/outdoor growers bible. I can't cut and paste due to it being a pdf. So here it is.

HYDROGEN PEROXIDE
Hydrogen peroxide is similar to water but carries an extra, unstable , oygen molecule which can break down into a reactive atom and either attach itself to another oxygen atom or attack an organic molecule.

Used in horticulture, hydrogen peroxide provides a host of benefits by cleansing water of harmful substances such as spores, dead organic material, and disease-causing organisms while preventing new infections from occurring. It removes the methane and organic sulfates often found in well water as well as removing chlorine from tap water.

Hydrogen peroxide is especially useful in hydroponics, where overwatering can be a problem. It prevents oxygen depletion in the water around the roots, leading to better root growth. A solution of hydrogen peroxide can be used to sterilize seeds resulting in better germination rates.

Hydrogen peroxide is dangerous at high concentrations (35%) and will damage skin, clothing, and most anything it contacts. Lower concentrations like those found at the drug store (3%) will still need to be diluted before use, though they are not as toxic to the gardener.

Maybe this will clear up the whole hydrogen peroxide is bad/good deal. and like i said i just retyped this straight from the book. so i cant take all the credit.