I've done a bunch of searching but can't find an answer to this. Where does the CYA go???
I test my own chlorine (fas/dpd) but rely on the pool store to test cya. When I notice my chlorine levels dropping I take a sample to the pool store and they tell me my cya is low. I assumed that cya was like salt, that overflow from rain and filter flushing is the only way to lose it. Is that true? Should my cya track my salt levels?
In the last month, my cya has dropped from 80 to 25, but my salt has been stable at around 3000. Does the sun normally eat up some of the cya?
As an aside, this forum and the info I learned have been a lifesaver. I no longer struggle with my pool. I was close to getting a dump truck full of dirt and filling it in Now, it is clear and beautiful all the time.
11k gallon pebble tec pool
Hayward DE filter