I would suggest 80ppm as a maximum. It is possible even higher, but it will take a lot of bleach and reagent to test that high.
You need a good kit to know where the CYA truly is to know what is possible. It could be 200-300ppm for all we know at this point.
You need a good kit to know where the CYA truly is to know what is possible. It could be 200-300ppm for all we know at this point.