I'm looking into getting a fish to eat my guppies. I looked at many new world cichlids but my water just isn't the correct P.H. for many of them. African cichlids are totally out of the question. The guppies are mine so I am not worried at all about disease or underfed fish. I know the P.H. and water temperature of my local river and I am wondering, would a bluegill or SMB be happy in a 40-55 gallon tank with out any plants, several large rocks and a guppy or two every other day?
