Hydrogen Peroxide?

[GpsFrontier]

I am looking into using "hydrogen peroxide" in the new hydroponic systems I am building. While looking into it I have read something about using "food grade hydrogen peroxide." I am wondering if there is a difference between a food grade hydrogen peroxide and the hydrogen peroxide that you find in the pharmacy first aid section for putting on cuts. Also, if the first aid hydrogen peroxide is something I should avoid using.

[HydroACR]

From what I've read there are different strengths and the drug store solutions are pretty weak. They are also stabilized with some other ingredients that might not help out the plants. Maybe try sourcing it from where science labs buy their chemicals from?

[Luches]

Originally Posted by GpsFrontier

I am looking into using "hydrogen peroxide" in the new hydroponic systems I am building. While looking into it I have read something about using "food grade hydrogen peroxide." I am wondering if there is a difference between a food grade hydrogen peroxide and the hydrogen peroxide that you find in the pharmacy first aid section for putting on cuts. Also, if the first aid hydrogen peroxide is something I should avoid using.

Actually, if it is labeled hxdrogen peroxide at 35%, it should be H2O2 and nothing else. Otherwise, or if there are any additives, - they should figure on the label. Low concentration H2O2 may use some stabilizers, but I've read studies where "stabilzed" low concentration H2O2 was used to disinfect setups .

As it is a powerful disinfectant and antiseptic, it kills every living organism but the plants, if used in the right concentration (dilution).

Though, if using hxdrogen peroxide one should be aware that all micro organisms in the systems get killed- also beneficial organisms or fungus die. As I add Trichoderma harzianum to my reservoirs, I am obviously avoiding the use of H2O2.

[GpsFrontier]

I just thought I would post an update in case it helps anyone. I had e-mailed General Hydroponics with the same exact question and there response was:

"Hello,
I think the only difference is the concentration. Food grade is 10 times stronger. It is also ten times more expensive.
Thanks"

I am not concerned with the concentration because I won't be using that much to go to the time and effort of finding a source for the 35% concentration. One bottle of the 3% from walmart for $1.06 will probably last 6 months. If not whats another $1.06.