Hi everyone,
My wife and I are new to pool ownership (two weeks into pool ownership to be exact). We seem to be getting the hang of things pretty well, however, there's one problem we've heard many varying different opinions on what could be wrong.
The previous owners of the house didn't maintain the pool after the contract on the house was accepted, so we have cleared up any water chemistry/algae problems left behind. We are to the point of vacuuming our pool and are actually able to see to the bottom through our crystal clear water! However, after vacuuming the pool, back washing, and rinsing, the returns return sand in the pool for a good 20 seconds after putting the filter back on filter mode. The sand doesn't come immediately after turning the pump on, it takes about 10-20 seconds to start, and lasts for about 20 seconds. We used the trick we learned from lurking on here of putting a sock over the return to catch some of the particles returned to verify that it is sand. The only time the returns produce sand is after backwashing and putting back on filter, and it only lasts for about 20 seconds. Otherwise all is fine.
We have contact various companies and pool-experienced people, and they have said anything from a broken lateral, to the sand needs to be changed, to potentially a spider gasket may be broken. Anyone have experience of this situation happening?
I'll update my signature later tonight with our exact system. Any help or guidance would be very much appreciated!