Oh I understand now about being top heavy, But I thought I had read that with alot of muck on the bottom that it should be up a little bit. I have a 30 gallon barrel that is in half, I could cut it down to about 12 inches tall put a hole in the side for the air line and leave the diffuser wide upon in the center and be low center of gravity and tie a rope or wire it up so I could move it
