hi all. i have a 10,000 gallon above ground vinyl lined pool with a sand filter. recently (in the last few months) i began noticing sediment on the bottom of the pool. My water parameters are all fine and my water is stable. It doesnt seem to be algae as the only time it appears in the pool is if i run the filter. If i vaccum all the sediment out and leave my filter off the sediment doesnt come back (i have left it off for up to 2 full days to test this). If i run my filter the sediment re-appears within an hour. This made me thing i have a broken lateral and that it is sand being forced into the pool from the filter, however if you step on the sediment when you are in the pool it immediately disperses completely (to the point that you cannot see it at all) and it doesnt feel gritty at all (which i would think sand would). Any ideas on what this could be? is it sand? do i have some sort of algae that is living in my filter only (is that even possible)? I have attached pictures (not the best quality but the best i could get with my phone). any advice is greatly appreciated. thank you in advance.