Split off of Chlorine/CYA Chart. JasonLion
Im not sure the relavence of this chart. the key is to protect the chlorine that you put into the pool. 10 ppm of cyanuaric acid will protect 1.5 ppm of chlorine from the UV destruction of the Chlorine Molecule. The 1/2 life of Chlorine when unprotected is 1 hour. By adding stabilizer it will greatly decrease your cost to operate your swimming pool.
So if you want to keep 10ppm of Cl2 in your pool, you should have a cyanuaric level of atleast 70 ppm. Because of the added benefits as an algacide and ph buffer i recommend to keep the stabilizer as high as possible. In Florida with concrete or gunite pools, I recommend a stabilizer of atleast 100ppm and a max lmit of 400ppm.
I wrote a piece about this on my website.