It's a 5.5 gallon btw, so I feel 100ml is a bit overkill.
Is there a filter media that actively absorbs or removes nitrates? I've read that purigen just removes the source of nitrate, but not the nitrates themselves.
Last edited by Darkblade48; 11-06-2013 at 11:14 PM.
Reason: Please use the edit function for back to back posts to keep threads cleaner