Vacation success but high calcium

[houston_tink]

Successfully went on vacation for the first time and left pool for 9 days. Used trichlor tabs in in line chlorinator.

Cya went from 35 to 50 which I expected (I had 15 tabs in there to keep my FC at 5!)
but my calcium went from 275 to 325. Why would this happen if they aren't the calcium tabs?

 

[YippeeSkippy]

Do you have an auto-fill device in your pool? If water evaporates it leaves behind the calcium (and CYA). So if your pool was re-filled automatically you might not realize it.

Maddie

 

[houston_tink]

Yes, I have autofill