Filter Spitting Sand into the Pool

[Watermom]

Sounds like it may be a broken lateral or something. Poconos or somebody will be along shortly to offer some help. But, one thing I can tell you is that it is NOT because you need to replace your sand. Nor add "sand cleaner." These are both things that pool stores may try and tell you. I have had the same sand for 10 years, CarlD has had his for 8 years I think and Al (Poconos) I think even longer than that.

[AnnaK]

Had you backwashed your sand filter just before that happened? Backwashing can cause sand to blow back into the pool when you subsequently turn the pump on if you forgot to put it through a rinse cycle.