Run around at pool store

[miker1755]

Does a high CYA level actually mean you loose less CL daily or is your CL level high enough that even after 2-3 days your CL level doesn't drop to the point where an algae bloom can get started?

[aylad]

I lose less chlorine. For example. When my CYA is 40-50, I lose 4-6 ppm per day. At CYA of 90, I lose 2-3 ppm per day. My baseline Cl levels have to be higher, but my chlorine loss to the sun is half by running the higher CYA.