A couple of weeks ago, I put some filter cleaner in my sand filter. The cleaner directions said the run the pump with the cleaner in it, and I think I might have turned the pump back on with the multiport valve thing set in the wrong direction because now, there is sand one the bottom of my pool. I put the hayward pool vac in and it gets sucked up, but the next day it is there again, and again, and again.... I thought that maybe I have sand in my pipes, and it just gets pumped into the pool a little at a time.... Is that what is happening? What is the problem and how do I fix it?

Thanks,
Ed