Sorry I didn't mention this was for a small pond RM, 100 gallons. It looks like the liittle giant is for large ponds. I'd like it to be out of sight. I've seen pressurized types that can be buried up to the lid. I suppose I could hide it if it was above ground.I'm just looking for a good filter that is easy to maintain outside of the pond.Don't mind if it's gravity or presssurized.