Hi all. I have been a paid subscriber to the Pool Math app for a few years now. I've noticed it seems to underestimate the effect of adding dry stabilizer. For all other products such as 10.5% sodium hypochlorite, and 31.45% HCl, the calculations seem pretty accurate, but whenever I add dry stabilizer (Clorox brand, 100% cyanuric acid), the app doesn't get close. For instance, yesterday my CYA was reading about 20. The app said that 10 oz would raise it about 4.5 points for a pool of my volume (17.5k gal). So, I weighed out exactly 10 oz, put it in a sock, and hung it in front of a return jet as per my normal S.O.P. Today, after about 24 hrs of dissolving, I pulled the sock which still had quite a lot of dry stabilizer left, and I tested the CYA. The results showed 30 ppm. That's a 10 ppm increase with far less than 10 oz CYA added. This is not the first time this has occurred. Has anyone else had this issue with the Pool Math app? Is there something I'm not considering or something I'm doing wrong that would make my CYA rise far more than expected from adding the recommended CYA amount?