I took apart and cleaned my Pentair FNS DE filter today as I have done previously with great success. When I removed the cover this morning I noticed that the "sock" on the internal air bleed assembly, which is mounted on top of the manifold, was badly cracked. Went to the pool store and they sold me a similar item that they said would last longer as the sock is made of stainless steel mesh. This is literally the only change from my usual cleaning procedure.
Fired up the clean filter and added 10 lbs of DE and now my pool water is full of DE. It is visible on the steps so I know it's not just cloudy water. What to do now??