It is a 60 gallon setup with a CO2 tank (roughly 3 drops per second), DIY inline CO2 reactor, UV clarifier, and 150 watt T5 lighting. I have over 30 different fish such as Discus, Clown loach, Neon tetras, Rummy nose, Rasbora, Chinese algae eater, guppies, ballon ram, and otocinclus.