Thanks for your input everyone!
The fingers are not working properly. When I opened it up there was no DE in the tank, normally there would be a thick cake of DE around the base of the fingers. I believe the loose fingers may cause a high pressure point capable of pulling the DE through the mesh and putting the DE back into the pool. Currently my pool is so green and cloudy that I cannot tell if the DE went back in or not.
Further investigation into the nature of the finger problem is coming, hopefully I can just reseat or replace the affected fingers.
For the time being I am using the finger assembly from my old EC-65. The fingers are a little shorter than on the EC-75 but otherwise the assembly is identical.
Thanks again =-).
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