I searched around on this topic, but didn't really find what I was looking for...
I recently turned a complete swamp into a pool, and had a question about the DE in the filter.
When I first got started, I decided to manually clean the filter. When I opened it up, there were large clumps of DE on the bottom of the filter tank and stuck to the filter grids....it had a clay-like consistency.
Once I had finished the cleanup, I decided to clean the filter again. This time, I still noticed some large clumps of DE on the bottom of the filter, and some stuck to the grids. These weren't as clay-like, more soft, if you will.
My question is, is this normal once the filter becomes dirty? Does the DE 'clump up' when it gets really dirty?
If you are interested about what it looked like before and after, I created a thread here: 4-hard-days-worth-it-t59369.html