This is a very enlightening discussion for me. I'm wondering - do you guys install two (or more) diffusers to allow you to have one at the deepest part of the pond for warm weather and one at +/-4 ft. for cold weather? And if so, do you have a tee in your tubing with valves to direct the airflow?
A long time ago I read that the deep water diffuser should be elevated approx. 1/3 of the total depth above the bottom. Does this still conform to today's technology? If so, how do you elevate the diffuser off the pond floor? I was thinking about a 55 gal. drum full of concrete. But that's a whole bunch of bags of Sacrete!
