Sand Filter Pressure Problems; Sand Bad in 3 MONTHS of USE?

[MikeInMo]

I wasn't there when the pool builder put the sand in but even with the other issues I have with them I just can't see any company putting in the wrong sand. Could be wrong but don't think that is it.

The filter is also doing a poor job of filtering now as well and the pool is starting to show it.

Your comment about the waste line might explain bleed down issue. It wasn't until they actually closed the pool last year that they finally put one of those blue rubber waste hoses on; before that I just had 3' of 2" pipe that sent water all over my pad. (The blue roll up hose connected on to that 3' pvc pipe.)

Any additional ideas?