This is a simple submerged filter box for use with a submerged little pump. I use it in a vivarium to keep my fish and waterplants happy and to keep my waterfall running. works perfect. Use the aquarium foam filter in the front and some lava stones (or similar) in the second part of the filter. just put the pump in the back and the hose trough the lid and connect it to the pump.

Please ONLY use PLA as it is non toxic for water life.