Well, I have finally ordered my aeration system. I went a Kasco RobustAire system with 3 diffusers. My pond is right at 1 acre and the compressor will be about 300' from the manifold so should work fine. Pond is right at 1 year old and doing great so far so this can only help, I hope. For those with a Kasco system, have you been happy with it?