In article ,
Dan Espen wrote:

Kurt Ullman writes:

How often? We use the cleaner gunk twice a year.

If you ask in a place that wants to sell you the sand
it's usually once a year.

Common sense and my own experience says every 3 or 4
years works just as well.

Thanks. That is what I was thinking


Oh, also I'm in NJ, the pool gets used 4 months a year.
That could make a difference.

I'm in Indiana so it is about the same.