I've used homemade and have gone to a small pond filter. Runs off 110 vac and has the pump and filter in a single housing. I extended the outlet pipe so it comes out the surface of the tank. It sprays the water in a fountain and aerates the water. Had it in one of them 250 gal tote tanks. I'm using the tote tank for another project so am back to a 50 gal. plastic drum.