Ideas for a 28 gallon tank?

would go with a couple of kribensis. They are a dwarf cichlid and usually get along in a community setup. They are very interesting fish with great personalities. They are even cooler when they are breeding, because their colors realllly come out and they are very good parents that don't eat their young or let others eat them. I have a pair in my tank and are by far my favorite fish. They are always swimming around and checking the whole tank out. You won't be disappointed with them.