Response to I actually have 2 issues that I believe are related. 1., Losing some sand when I backflush, not a lot, but noticeable, maybe 1/2 cup. 2., as the filter gets dirty, the pressure drops and water flow is reduced. After backflushing, pressure returns to normal, about 15PSI. System is Aquaflow 1HP 2 sp, and a Hayward S180T filter.

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