I bought this second hand from one of the local pet stores when they got out of fish. Fluval says it is discontinued. I'm not sure how to set up the filtration area. The dark part on the left is stuck;, the dark piece that is sitting angled is difficult to fit anywhere, under the dark square is a bunch of ceramic filtration media. If it is too difficult to figure that out, I think I'm just going to opt for sponge filters, as this will be a shrimp tank. Thanks!