Rainman I totally get what your saying about adding a piece of PVC pipe with a Male threaded end to hook up hose since I can't get under once its zip tied. This was my idea drilling two holes and attaching two ropes to lower level and pull in fall.

Shrub your idea is what made me think of this. Little easier and cheaper.

Bill the diffuser it's already on a base. It's like any other diffuser like the vertex kasco etc. Thinks it's a living water aeration base. The PVC tube would attach to base about 6 inches so I can hook air hose to it. Liking the tire idea but that seems very heavy and a pain in the butt of you pull yearly. Maybe I'm wrong. Maybe a little 13 inch tire wouldn't be bad. Hmmm good idea the more I think about it. May try that if the pan doesn't work but I'd think it would as its giving it a big base