I picked this up to use as an extra tank to thin out my display, but decided on a bigger tank a week later. 8 gallon cube, return pump and hydor heater included. Downside is the false wall separating the filter section is detached in the middle, so it would either need to run some silicone on it or just remove the panel an open up the tank a little more. I'm looking to trade this setup for some corals or possibly reef safe nano fish. Let me know what you have to offer