Keep or Dump Sand every year?

[CarlD]

Don't change the sand! It filters BETTER as it gets older and dirtier. You should only change the sand if you have a problem (like it's gummed up).

I'm currently on my 4th season with the same sand and don't expect to have to change it for years.

[Poolidiot]

I agree with Carl. I am on my 5th season with my pool and I have never changes the sand.

[Poconos]

I'm starting my 9th season with the same sand. Think maybe I should add a little because of the little that is lost when backwashing...but...maybe next year.
Al

[seminolewind]

Same here, on my 5th swimming season with the same sand in my Hayward filter. They work better the dirtier they get.