I have a new Pump and Filter that where sized by the pool store and installed by me. I am having issues with filter sand (90% sure it is filter sand) in the bottom of the pool. I have vaced it to waste a few times but it keeps coming back. I opened the filter up today to check the Freeport level thinking mabe I overfilled it and the sand was bowel shaped with the sand level at the center around the riser stem at about 16" and the sides where about 8" below the rim. The book calls for 10.25". there was sand/debris trapped around the top of the stem where it mates to the bottom of the multiport. this area was clean when I put it together last week. I have a Aqua Gene that has a slot for the return water so I have not been able to do the sock trick to confirm the source of the sand is indeed from the filter.
I have only two lines on the suction side of the pump that average about 38' of head and the performance graph of the Pentair 1hp single speed Superflow pump shows a GPM of about 70 at this head. This is 10 GPM greater than the TA-60 Filter they sold me. Could this be causing the filter to force sand back into the pool?
sure looks like the 3/4 hp would have been a good fit.
I paid them a $85.00 service fee to come and look at the pool before they proposed this new equiptment.