I have had a reef tank 180-gallon main tank and a 60-gallon refugium. Everyone has been quite helpful on questions. For 15 years I had no problems until algae bloomed. Since then all numbers are under control. I now have too big Damsel's and can't add new fish, so am starting up Corals. I would appreciate any suggestions. Is there anyone out there that wants big Damsels, one a black dot Damsel and the other a Paradise Damsel? I will trade for smaller fish. I have started Coral's but only 3 so far. I've done fish all my life but only saltwater for 15 years. My buddy that got me started left and thank goodness for google, haha take care of other reef tank owners!