I have a 72 gal for 2 years. Did have 6 damsels,2 urchins,2 mushrooms,LMBlenny, choc chip starfish, snails/crabs. I put a coral beauty with more snails/crabs in on Sept 29th (~3 wks). Domino Damsel was aggressive and coral beauty hid mostly. Coral Beauty died 2 days ago and I took out the...