Hey guys, I'm new here and I have a problem with my filter.
I have an above ground pool 18' x 4' using a sand filter (hayward sm1700t) and a index saltwater pump. My backwash works fine, however, when set to "filtration" my sand pump will seize up after ten seconds or so (sand pump actually swells a little). I know it's not the motor because it runs fine on "backwash" and "rinse".
I never had this problem until I recently converted to saltwater. We disassembled the sand filter the first time this happened and checked the folding fingers that rest at the bottom of the filter for clogs. We thought maybe the salt hadn't completely dissolved yet. After we reassembled the filter the next day, perfection!
Everything worked fine until a week or so later when I noticed the return wasn't flowing as fast as you usually does. I thought a backwash would help but after turning in back to filtration it seized up again. Could it be that I don't have enough sand?
Sorry for the long winded story but I want to give as much detail as possible. Any suggestions are greatly appreciated!