Okay, so I just test the CYA level of my parent's pool using the turbidity test. Results were 100ppm.
I also tested the chlorine level using the Poolmaster OTO test and it is in the 2-3 ppm range.
The pool looks good and it has been looking good for a while now.
My question is: should I really add more chlorine because of the high CYA? Some of the charts I'm seeing about the chlorine/CYA relationship are telling me I should have about 7-10 ppm FC. I don't really have a huge problem doing that. I kinda of just want your feedback/experience, and I want to make sure it is safe, etc. It just seems really high to me...
Pool is around 18,000 gal, in ground plaster with DE filter.