Ok i started out with a ten gallon tank converted from fresh water. People said it would not work lol but it did for me. Now i have a 20 gallon i would have gone bigger but my apartment complex only allows 20 gallon tanks no bigger. Anyways its been about a year and a half since the 20 gallon has been up and running. I have a pair of oscilarius clowns and two blue and yellow damsels. All the fish get along and they are quite happy except for when i clean it the smaller clown always pecks at me. My problem is i got my water checked at the store and its all good except for a bit of ammonia which we figured out the problem was i was diluting the saltwater with tap water instead of filtered water. but my plants will not grow and that the main reason i wanted a saltwater tank was for the awesome plants and fish. One of them is the same size it was 8 months ago when i bought it. it seem to have shrunk in size to be honest.