Crikey, a whole bottle? That's a guaranteed tank nuke, kills every living thing.
If you want an effective H2O2 treatment, try mine:
The "One-Two Punch" Whole Tank Algae Treatment
The H2O2 portion can be used separately or in combination as I described.
Also, bacteria convert ammonia to nitrate, not the other way around. Plants can use ammonia or nitrate directly, so a functioning biofilter isn't required.