I have a 55 gallon with live rock. My tank is only 7 months old. I have a coral beauty (doesn't bother the corals), 2 blue reef chromis, 1 long fin fairy wrasse, 2 percula clowns, 2 shrimp (got rid of my peppermint :mad: ) a scarlet and blood, several crabs (mithrax, boxing, marshall island...