Recent content by Keith F54

I rarely backwash, just because I've never found that to be very effective. I always break down the filter grid and give the whole assembly a good rinse, then start with fresh DE. Last year I probably went through the routine 3 or 4 times, especially since the clumping problem was so...

Thanks - I have been careful with how much DE I put in - I will review that aspect again. I have not been as careful about cleaning the filter grids - just rinsing thoroughly - so I'm going to try to learn more about how the pool chemistry could be a contributor to the problem.

Why has the DE started to clump? I'm running an in-ground, plaster pool in the back yard, approximately 20 X 40, 27000 gallons; for several years after moving in I had no trouble (other than the usual) in cleaning my DE filter grids. Last year I replaced the manifold and grids, and now I...