I have retested and it looks like right at 100 for the CYA . I will start adding more cl up to at least 5-8 ppm. I think you are right that maybe because the water temp isn't over 85 is why I have no algae but with a Houston summer, I don't want to take the chance.

I still don't have a real answer. Is running with a high CYA going to hurt anything?

Stephen