i have a 175 bowfront, a 7 gal bowfront, and we are adding a 15 gal in the bedroom. I like the look of small tanks, partially because you can see things you cant in a bigger tank. A friend of mine has a boxing crab. It is awesome!!! I would never see it in the 175 though. Same goes for shrimp. I cant ever find them. I have learned the trick is keeping the bioload low in a tank that small. I cant even find my new zoo frags in my 175, they get blown everywhere lol.