Hydrogen peroxide is all good for hydro where you want a sterile root environment, and the added benefit of the extra oxygen it adds to that resivoir is great, and thats all well and good. But you look like you have a bunch of organic products that would do wonders with microbes etc... but if you use peroxide there will be ZERO microbial life in your root zone because h202 kills all microbial life, good and bad. In a non-organic hydroponic resivoir, sterile is what you want. In an organic soil/soil-less medium, peroxide is the last thing you want.
In Dirt:
Use peroxide water with an anti-fungicide and a high Phosphate fertilizer (9-45-15, 10-52-10, 0-60-0) for root growth. Or any other product with rooting hormone dissolved in it is helpful in regrowing roots and is strongly recommended. Water heavily until liquid pours out the bottom of the pot. This sound like bad idea, but it flushes out stagnant dead water and replaces it with fresh highly oxygenated water. Don't let plants sit in trays full of water, the soil will absorb this water and stay too wet. Don't water again until the pot feels light and the top inch or two of the soil are dry.
Thats all great, but the added benefit of the extra oxygen negates ALL of those awesome organic products you spent all that money on. The reason they are telling you to add a rooting product is because of what it does to the microbes in the root zone (microbes are important in soil/soil-less growing usually) I've read that whole thing about peroxide and H2o2, and that was when I grew hydro, now that I grow dirt I use peroxide in my final flush to kill off the microbial life to help my plants finish up.
Trust us dude, you will regret using peroxide, I dont know who told you thats the thing to do but they are 100% completely and utterly wrong.
If you still feel the need to do so, please, take 1 plant and do NOT add the peroxide to that one single plant. I guarantee before you decide to induce flowering you will never use peroxide again, but the down side is you will have killed all the microbial life in the plants that you did use it on, ruining the substrate, not ever able to be populated again throughout that grow.
I hope you listen, but if not its all good bro, its your grow, but I'll say it one more time, dont use it you are going to regret it. I can see the logic in it, but throw an air stone in your water buckets and that is more than enough oxygen for plants to thrive in and as far as anti fungal or whatever, let your plants dry out between watering and there will be no problems, most times you end up with shit going on above the soil, and truthfully other than the o2 blast, theres no other benefit.. If you get root rot, then I'd think about using it, but not as a preventative measure, not for soil-less.
And one more thing, if you do decide to use the H2o2/peroxide, it will kill your plants or almost kill them if you dont let the peroxide sit and bubble in some water for a minimum of 18-24 hours, its not a ready to pour in product, it needs to "settle down" a bit.