K. another question. Are you using a 25ml pool sample? It looks like you are. From now on, use a 10ml sample for FC/CYA. The directions are on the inside lid of your kit. Just count the drops and divide by 2 when using the 10ml.

Arg. Don't like that CC value. BUT don't add more chlorine until you get that CYA into the pool.

Instead of going to Leslie's, you can buy CYA (cyanuric acid) much cheaper at Menard's, Home Depot, Lowe's, etc. Look for as close to 100% cyanuric acid as you can find.