I just took over a tank from a friend. She gave me about 45 pounds of live rock, 2 ocellaris, 1 dottyback, 2 striped damsels, a decorator crab, and 1 cleaner shrimp. She had them all in a 40-gallon breeder with a cheap protein skimmer. I just moved it all to my 50-gallon with a 20-gallon sump...