I have a funny shaped 15g sitting empty and I want to do something with it. I've been looking at shell dwellers but I can't find any around me. A pair or male and 2 females is all I looking for but i really want to do cichlids. I already have a tropical tank. It's 12x12 by I think 24 inches. I know it calculated out to 15 gallons. Other then the Shellies, what kind would for? I have a very limited selection because they're all labled assorted. I like the look of those krib cichlids but I don't know if they would work.