bottom feeders

My male dolphin plecostomus has started swimming in the middle of the tank with my African Cichlids. He has also stopped eating algae wafers. He now swims up to the surface and swims upside-down to eat the cichlid food instead of his algae wafers. He has also shown cichlid mating behavior. It...

So I'm getting a free 55 gallon tank from a friend and I'm super excited about it. However, I don't really know what kind of fish I want to fill it with. I want freshwater, something other than chiclids, something with personality, maybe something not too hard too keep but at the same time not...