OK. You need to spend some time reading our threads on the B-B-B system and understand the relationship between chlorine and stabilizer (CYA) levels.

Go to poolsolutions.com and start reading.

Chlorine tablets are usually Tri-chlor, a form of chlorine. For every ppm (part per million) of Chlorine it adds, it adds .6ppm of stabilizer.

Check our Best Guess chart to see the relationship.

Stabilizer prevents chlorine from breaking down rapidly in the face of UV rays. However the more stabilizer you have, the more chlorine you need to sanitize your pool. This is NOT necessarily a bad thing, but it can be.