I have a 29-gallon and because I had leftover equipment and a bit more space, I added a 10-gallon tank. I had a whole bunch of trouble at first what with dead coral, etc. I got it straightened out, and some of my recent coral purchases are even growing. Looking forward to having some of my questions answered here. I had saltwater fish some years ago; back when there were only 3 varieties of clown fish.