Just took clones, what to feed

Have 2 gallon cloner? What do I feed the clones?? I have root 66 (general hydroponics), what else to use ?? Also do I need to put hydrogen peroxide in there too ??

Also I took 4 clones then same day switched to 12/12? Was this bad, should you NOT take clones then flip to 12/12 right away ??

I just use 35% H2O2 t keep the water sterile in the cloner, but most on here use some kind of root additive, which ever you use go very very lightly on it.

And no it doesn't matter I've taken clones at late as 2-3 weeks into flowering.

Plain tap water is all you need and there is no need to adjust ph.

No root additives or very little