You shouldn't use h202...it messes with things in a not so good way. H202 should only be used for sterilizing. Keeping water temps down and using a root zone cleaner like UC roots. It helps keep the root zone in good shape.
I just finished a run. 72 degree water(no chiller) and UC roots. Healthy roots.
I respect what you say, but I've also heard the opposite from equally successful growers. This is the biggest issue with cannabis - there are many ways to skin a cat and everyone's got something that works for them!