Crikey, a whole bottle? That's a guaranteed tank nuke, kills every living thing.
If you want an effective H2O2 treatment, try mine:
http://www.plantedtank.net/forums/sh...d.php?t=203684
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.