Here's the situation-I have a 72 gal for 2 years. Wet/Dry filter and also an over the side filter. 2 powerheads. Did have 6 damsels,2 urchins,2 mushrooms,LMBlenny, choc chip starfish, snails/crabs,live rock,sand/coral bottom. I put a coral beauty with more snails/crabs in on Sept 29th (~3...