To anyone that has a working Bell Siphon, I would like to find out the diameter size of your stand pipe & return pipe back to your fish tank. The amount of slope, length of return pipe, did you use a pee trap just below the Bell Siphon or not. Is it a straight shot to the tank or did you use any elbows?

I really believe that the problem I'm having has more to do with my return, not the Bell Siphon itself.

Thanks for any information you might send my way. Rod