I have a 29 gallon tank with 4 zebra danios that keep the tank hopping, 3 pristella tetras, 1 cardinal tetra, 1 white cloud tetra, 1 cory catfish. All healthy fish. Oh yeah, and snails that do a marvelous job cleaning up. No live plants, lots of plastic/silk ones. I'd like to add 3 or 4 more of something. Not sure what. Looking for suggestions. (Incidentally tank is fully cycled, 2 years old, always great water parameters.) Thanks for assistance.
