My pond bottom was packed down using large dump trucks full of dirt, so he bottom is fairly firm but there is some clays on the ponds bottom that is getting disturbed by the diffusers. I will see some lightly cloudy water around the diffusers. I started out by setting the diffuser plate on cinder blocks and then on kiddy swimming pools (4' by 12") and also tried the large water heater pans. None of them worked, but it's not that bad, I can live with it but I had never seen it mentioned prior to buying the diffusers. If it continues through the winter I will try something else with a larger base after the water warms up and I can see under water with scuba gear. My thoughts are when I move them for cleaning and reset them on bottom it will all start over again. The best I can tell it does effect the ponds overall water clarity and may reduce the visibility by approx. 2". If I shut it down for a day the visibility will clear up about that much.
