I've had my 75 gallon tank setup approx 2-3 months now, I have 1 damsel fish, 1 clownfish, 1 saddleback butterfly, 3 hermit crabs, 90 snails, 40-50 pds of live rock, 80 pds of live sand, an ehiem 2217 canister filter (phos-ban remover & chem-pure inside), seaclone protein skimmer, 2 powerheads...