Opened our pool a couple weeks ago with a new liner and fresh water. Started the BBB method and had the water tested at the pool shop while we waited for our "big boy" pool test kit. Our numbers were "good enough" (I posted them here and was told it was fine) except CYA, which they tested at 20. So we added 28oz of the powdered stuff in a sock. Stuck it near the return and gave it a good squeeze once a day. It dissolved.
During this time, everything has been great pH and chlorine wise (using a basic kit), and the pool is gorgeous (something my BF insisted wouldn't happen given his problems in the past). IT's been very rainy, and with the solar cover on we've only needed to add chlorine every other day or so. Totally clear and sparkling and making me a happy camper
Got our TF-100 in the mail, just tested today, and everything is pretty stable...except after adding the CYA, and doing the CYA test, I'm registering zero. ???
Chlorine - 4
pH - 7.2
TA - 80 - 90
I do want to get the pH and TA up a bit but am mostly concerned about the CYA. I did the test twice and got the same results both times.
Am I doing the test wrong? Is it possible that the CYA went from 20 to none, because of the rain (and because the pool testing places are often off)? Not sure what to do now...considering adding liquid CYA?