I upgraded to an Intex Ultra XTR 18x52 pool from my last years Summer Waves... I use the Intex Saltwater/Sand filter... Anyway, last year I had zero issues, got everything balanced and easily maintained.... However, last year I used liquid Stabilizer/CYA and this year with everything closed in my area due to Covid I was only able to get a hold of CYA in granule form... I followed directions by adding the necessary amount to hot water and then after awhile added directly to my pool... As you are probably guessing I have piles of CYA granules sitting on the bottom of my pool not dissolving... I decided to a backwash/rinse of Sand filter and then vacuumed the CYA from the bottom of pool directly into my Intex sand filter and I'm letting my Sand filter run for a straight 24 hours.... Im hoping that the CYA will dissolve and disperse over time from the Sand Filter... Is this ok or did I screw up and harm my filter.. Everything seems to be running fine and there is no PSI increase, etc..... thoughts?????????