Membership upgraded . . .

Wow. I don't recall seeing numbers that extreme, before, on a pool that was actually in operation.

OK.

1. Kelemvor is correct to point you to the need to test your fill water. In Tucson, your evaporation rate is going to be very high, which probably means you regularly have to top off the pool. You need to know what you are topping it off with.

2. There are two ways to lower CYA. Kelemvor has pointed you to the easy and straightforward one. If you can drain and refill for a reasonable price, that's the way to go. BUT, you'll need to be SURE to get test values on any water that's trucked in, BEFORE you buy it. It may not be worthwhile to truck in water that already has high calcium levels. The 2nd way involves allowing your pool to get slimy for a month or more . . . and then may require cleaning up ammonia. It's something to explore if water is really expensive for you.

3. It's possible to lower calcium by precipitating it, but it takes awhile, and you need to be able to manually vacuum the settled calcium carbonate off the bottom of the pool.


Bottom line: if you have affordable high quality water available, either from your tap or via truck, that is the preferable option. So, check that first.