No they were fine and I took two off a couple of tanks in the showroom to do that mod you showed me. I did the mod and reprimed them ...clunk, clunk. Took off the pumps cleaned the impeller and pipes .... clunk clunk clunk. Replaced the whole impeller on one with a new unit ...clunk clunk clunk. Just now I replaced the pump with one I took out off the shelf using a old impeller and it worked, new impeller worked. Something killed the actual pumps on both and I doubt it was anything to do with the polyfiber. I'll wait for the Hagen rep to come in and he can replace the pumps.