Here is some info on the product-u need to go to the Hydro store for this.. I have used this.. Again like I said, I would go another route before trying h202.. I posted this so you guys could have some info on what I was talking about when I said 35%.. This is made by grotec called Super Oxy.
Super Oxy™ H2O2
35% H2O2 promotes thicker stems and larger leaves by providing additional oxygen

Hydrogen Peroxide is used through irrigation and is composed of water and oxygen which stimulates nutrient consumption. A higher oxygen level in the nutrient solution will improve the plants ability to take up the available nutrients from any medium. Proper use will enhance thicker stems, larger leaves and shorter spacing on stems. Can also be used as a cleaning agent in irrigation systems and/or propagation.