I can't imagine that being a problem Noel, since your diffusers are elevated. If anything, I would suspect just the opposite would happen if anything. Now, if they were sitting right on bottom...possible, but in all my reading I've never came across that. Sinking into the bottom sediment in older ponds....yes.

It would be a major source of frustration to have your aerator drill a drain hole in the bottom of the pond, tho.

.10 surface acre pond, 10.5 foot deep. SW LA. The epitome of a mutt pond. BG, LMB, GSF, RES, BH, Warmouth, Longear Sunfish, Gambusia,Mud Minnows, Crappie, and now shiners!!...I subscribe!!