Hi. I currently have a single dwarf gourami in my 20 gallon fish tank and I would like to add more fish into my tank. My aquarium is a tropical environment, with a temperature set at a constant 78 degrees (Fahrenheit). I would like the tank to either be an semi-aggressive or community tank. Schooling fish is preferred but not necessary. I would like to have different types of fish that will fill the bottom, middle, and top part of the tank. I would also like to not only put fish in my tank but also other organisms. My tank is moderately planted (at least 50%) w/ lots of holes and hiding places. Tropical fish that I am not interested include neon/cardinal tetras, guppies, and any large fish (their maximum size exceeds 5 inches).
Please give me the type of fish/organisms I should put in my tank as well as how many of them. I would really appreciate it if you answered my question. Thanks!