Hey Marc,
No sir, in the past year since I started using the Lucas Formula (maxibloom) I have not used h2o2.
Why?
I switched from hydro to coco and picked up Lucas because I was so tired of buying products. I made up my mind that I was going to make this style of growing work for me and I wasn't going to complicate it. If you are growing hydro then, yeah, I can see using some h202 to keep things tidy in your root zone but certainly not necessary.
That being said I have adopted a practice to keep my roots happy, healthy, and aerated. I water to waste roughly a liter with every watering. I have found this keeps things fresh and clean in my coco by washing out all the build up and exposing all the roots to the fresh solution. That's about as complicated as it gets for me.
I use bubbled tap water @ 200-250ppm
I charge my coco with half strength Calmag before a plant goes in.
RARELY do I have to use Calmag as a supplement. Only twice that I can think of.
I don't know if this helps you at all marc but that's my routine brother.