Tank dimensions are appx 24" tall, 25" wide on the diagonal and 23-24" wide from side to side - I think each side is 12.5 or 13" - its an odd dimension tank. I've talked with the guys at my LFS quite a bit about this tank and we've come to the conclusion that it probably came originally from petco/smart. I guess several years ago they used to have their lines of tanks custom made so that they would only fit their specific stands. It is not a standard sized hexagonal tank. I'm still not sure exactly how many gallons it is, but the various calculators put it somewhere between 37-42g. I got it with my 90g as part of a CL package deal and was told it was a 45g tank but I think its actually a little smaller than that. The guy who gave it to me said he originally found it in a thrift store for $10 (scary, I know!!). Its a pretty cherry color and I'm going to have a canopy built for it. It came with the original stand, which needs some refinishing as well. I leak tested it and it held water but given its history I think I'd just feel safer putting it in my apartment after resealing (unless of course I totally botch the resealing process!) The room its going in actually has very little ambient light. There was an old pc light that came with the tank but it doesn't work and I'm not sure I really want to invest any time/money into changing the ballast and buying new bulbs - I'd rather save that money for the kessil!
The reason I don't know if this will become a full blown reef or not is that I plan to put a dwarf angel in the tank. I'm going back and forth between a lemonpeel angel - love the coloring and its temperment should mesh well with the six-line and basslet - or the flameback - smaller and probably better suited to the tank size, but not as flashy in terms of color. Given the propensity of angels to nip at corals, it will really depend on which corals it takes a liking to as to how many corals end up in the tank. I do like the fact that the 350 is dimmable - that's a big plus in my book, but I haven't ruled out the 150. I do eventually see this tank being upgraded to a 72 bowfront and can add a second kessil over that tank when that happens (though not likely for awhile, probably when I buy a condo next year). Anyhow, just some background and future thoughts that are playing in to my decision making process!