NYgiantsRP
Aquarium Advice Addict
Azmodan is spot on. No plecos. No knife. I say no puffers, they become very boring after a few months in my opinion. Very territorial, no harmony. You could also have some shrimp or snails. Maybe 10 galaxy rasbora, 10 Pygmy cories, 5 japonica shrimp, and a dwarf gourami (blue,honey,flame...)