I have 2 12g nanos one dx and one regular I also have 2 20g tall tanks , the regular which I don't recomend for s/w with out a light upgrade but I do have a small clam some recordia's and a x-mas coral along with a blue damsel and a clown ,they have all done ok but the clam is going into a new 20g reef I'm setting up. The dx nano I am very pleased with and all the corals I have put in it have done fine. I am hoping that I can find someone who has done a light upgrade to there 12g dx and have the old hood sitting around they might want to sell or trade so I can put it on the regular nano so I can put more corals in it. So I guess what I am trying to say is that it really depends on what you want to put in the tanks thats really the disiding factor , of course if your like me and always rush in to my tanks , then you've always got a good reason to start another one. Dave E
