The pump is a 1 1/2 hsp Sta-Rite Dyna Glass.

The filter is old...the tag on the outside says

Max pressure-50 psi
Flow Rate-60 GPM
Filter Area-3.1 Sq Ft
Veritcal clearance-40
Horizontal-45

I have noticed it before when turning the back on so it has been doing it for a bit but I'm not sure for how long. I haven't been turning the pump on/off alot lately because I've been trying to clear the water so it's been running alot.

Between trying to clear up the water and keep it clear, finding a leak, and now having sand blowing out of the return I think I'm going to go crazy.

Thanks for you help!