Woodster, how do you propose to disturb the bottom? I agree, if we had some way to agitate the bottom sediments effectively we would give the bacteria a better chance. I have wondered about using a jet ski jet, a motor boat if we could direct the prop wash straight down etc. In deeper ponds how do you agitate the bottom? You would need a powerful post hole digger mounted on a barge that augers up and down at various places lifting and disturbing the sediments? But then do you introduce possibility for leaks? How do you do that with a properly compacted pond bottom? Some type of bottom crawling paddle wheel spinning contraption?