Well, I would suggest raising your CYA up closer to 50ppm. At this point you are almost letting the FC drop too low, so you need to add more FC when you dose. I would suggest not letting it get below 3ppm.
Each bottle is adding ~5.7ppm of FC ... that is a pretty high loss. But you are passing the OCLT, so I am kind of at a loss for explanation unless a lot of gunk is being blown in the pool.
You are letting the water circulate for at least 30minutes after adding bleach and before testing right?
Each bottle is adding ~5.7ppm of FC ... that is a pretty high loss. But you are passing the OCLT, so I am kind of at a loss for explanation unless a lot of gunk is being blown in the pool.
You are letting the water circulate for at least 30minutes after adding bleach and before testing right?