I have a Hayward DE-4820 that's about 7 years old. Last year I noticed when I would add DE, a little amount would come back into the pool through the jets. This year, after cleaning the elements, when I added the DE, a bit more returned to the pool but would stop after a few minutes. Then, I started vacuuming the crap at the bottom and noticed some of the green/brown waste coming out of all the jets. I opened the filter again, disassembled the grids and cleaned them all and inspected all carefully andI found 2 with holes. I bought and replaced both bad ones and went through process again and the same thing happened.
Is there anything else that would cause this?
I don't want to have to replace all other elements and then find same thing again.
Thanks.