Can't Keep DE Out of Pool

Pool Equipment
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1

I always have a fine layer of DE in my gunite pool (on steps and on bottom) even though the Polaris runs daily.  I have replaced the spider gasket and the multiport valve and the DE filters (they are rectangular plates) – all multiple times.  Does anyone know how the DE is getting back into the pool?

For lack of a better idea, I am planning to replace my Sta-Rite S7D75 filter.

Appreciate any thoughts, guidance, etc.

BTW, had Leslie’s and some other service people out but they are all clueless.

2

One common cause for d.e. returning to the pool is adding too much powder. The Sta-Rite S7D75 only requires 3.7 pounds of d.e.

Another cause could be a crack in the plastic manifold that holds the de grids.

3

Thanks for the feedback.  I use the DE sparingly and have also replaced two manifolds.  Any other thoughts would be appreciated.

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