For the guys having the bottom stirred up from the diffusers try moving them off the bottom. I raised mine 21" and that stopped all those solids from being disturbed. I just built a table from wrought iron using the wielder. Made it in just a few minutes, after all, I did not care what it looked like it's underwater. It will also help to keep the pond's bottom a little cooler in the hot summer.
Do not judge me by the politicians in my City, State or Federal Government.
