I installed a new above ground pool this weekend and have issues with sand deposits coming from my Hayward pool filter. I did a back wash, rinse and waste flush with no help. If this helps with the answer I did turn the valve one time without turning off the pump.....I know bad move but need to resolve the sand deposits. It happens during the recirc mode after I spend several minutes sweeping up the previous cycles deposits.

Any help would be appreciated in resolving this issue.