What all do you have in your 55G Jerry? It certainly would be big enough for an Atlantic Blue, unless you have a full load of fish in the tank already. Dave and I want one, but now that were combining tanks due to the elimination of the 180G, the (2) 45G, one being my Seahorse tank,and the other will house my 3 BIG Tangs and some of my goby's or blenney. The rest will go in the wall tank in the hall/my office. Gabbey decided that she doesn't want her brand new 28G after what she and I experienced over the week that Dave had to go to CA for business. Every tank overflowed, and we fought it the entire week that he was gone. That in itself made me realize that all I do is clean and maintain tanks. I guess we had 9 tanks going at once. We will be using those tanks only until we are ready to purchase another brand new tank that will fit into an area that's kind of dead because nothing fits there right as far as furniture goes. Hopefully we'll have a big beautiful tank again. I need a little break form having wet sleeves all the timel I'd really like to just sit back once in a while and admire their beauty. Kind of got off topic there Jerry...sorry about that. By the way, I'd love to have that beautiful fish you've got there, but I sincerely hope he can livein your tank with your tender care. Keep me up on the changes of him. Lucky you! I'm sure it will all work out for you! ....Angel