I have an above ground pool and am finding sand along the floor of the pool. I do not use a sand filter and the only place there is sand is underneath the pool. The sand keeps entering my filter and is clogging up my cartridge. I'm losing about 3 inches of water a week. May not sound like much but it is a 14,000 gallon pool. I'm assuming I have a very small hole along the bottom. I've looked but can't find it. Any suggestions?

Holes in Vinyl liners are notoriously difficult to find. Look at any fitting connection first, then snorkel along the bottom at the wall seam..