for filtration I have a pro clear 200 wet/dry, 2 xp3 canister filters and 2 emporer 400's. My wet/dry is pushing 1000 gal/hr. I don't know how my filtration could possibly be too little. Since my ph is at 7.6 why do i still have ammonium and not ammonia? could my plants be converting nitrate into ammonium faster than they can utilize it? also my tap water contains absolutly no chlorine or chloramine so that can't be it.. I am so stumped