I had sand coming into my pool this summer and hired a pool company to replace my lateral and spider thingy at the bottom in the middle of the summer. I didn't have problems with sand getting into the pool after and it stayed clear. Well I hired a company to close my pool, they emptied all the water onto my drive way. I noticed sand on my driveway. Not a ton but about a few hand fulls. I don't know if they backwashed all my water out of my pool or not, but I'm guessing they did, since there was a bunch of sand. I checked the sand filter by tapping on it and it still has about halfway up with sand, which what I read is normal. So it wasn't alot that got dumped out.
Do you just think this is from replacing the lateral and putting in new sand. Also from backwashing. I'm curious how sand stays in when backwashing. I can't do much about it now that my pool is closed though.