Hydrogen Peroxide (H2O2)
Hydrogen peroxide can be added as a supplement to raise the oxygen levels of your hydroponic nutrient solution. This will help stimulate plant growth and protect against the 3 most harmful garden organisms: pythium, rhizoctonia, and phytophthora. Humans actually produce hydrogen peroxide in the immune system in order to fight viruses and bacteria in the body.
Hydrogen peroxide is found in nature in rain and snow after water is exposed to ozone (O3) in the air and becomes H2O2. It is beneficial in indoor hydroponic systems because it will oxidize any organic impurities at contacts. The hydrogen peroxide releases one of its oxygen atoms into the nutrient solution and the remaining molecule just becomes water (H2O) and remains in the solution.