Types of fish
In my 55gal, Im have 2-small irredescent sharks, 1-small red parrot, 3-small koi, 1-Large placosomus, 1-small Placasomus, 1-small rainbow shark, 1-blue gurromi, 1-comet.
In my 20gal, I only have 2-small koi, 3-small gold fish, an algae eater, and 1-black mollie