bill i cant figure out how to upload pics. keeps saying its too large. Sorry bill not a pc guru. Heres what i have in my pond. I did pour sand into the bases but did not fill them by any means. pond is free of algae amd weed just water clarity isnt as clear as it was. i wonder if its possible a diffuser base rolled over or when sinking fell on its side http://www.livingwateraeration.com/2-acre-pond-aeration-system.html