Right now I have no idea lol. I do know I want it to be a habitat replication of a reasonably fast stream. Subtrate, plants etc. to match probably an Asian location. Filter intake at one end, output at another and a couple of power heads inbetween, forcing the water to travel the length. I simply saw it a few years ago going for £25 and just bought it, been in storage ever since, waiting for the day I can mount it in a wall haha