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" Also ... in a 27,000 gallon pool, 14 8oz trichlor pucks would add approx 17ppm of CYA. " Yeah, I was expecting about 1-1/4 ppm per puck, wo that sounds about right. So, the CYA part would degrade as well? It is a pretty old tub of pucks. Shame, I was hoping I'd found pucks without CYA...

I used tablets for years. After battling algae problems, I found this wonderful site and learned about CYA. I drained my 27K gallon pool and restarted spring 2019. All went well last summer. At the start of this season, I checked CYA and it was low. Since I was out of CYA proper, I thought...