I've managed to SLAM my pool into a good state after opening earlier this month, but my CYA is still kind of low. (It's ~20ppm for my 18700 gal). I'm low on pure CYA, but I have a bunch of 3" trichlor tabs that I figured I could use to bring it up.
The tablets say they are 93.6% trichlor, 2.5% zinc sulfate monohydrate, and 3.9% "other", which is where I guess the CYA is hiding.
I added two 3" hockey pucks to my floating tablet holders. Any idea what kind of increase is to be expected for FC and CYA? FC pre addition was 2ppm and CYA was ~20ppm.