I have noticed the chlorine level has been staying high in the pool despite not shocking or adding tabs to the chlorinator in a couple weeks. I have been waiting for it to come down, but it just is sitting between 8-10ppm. I also use nature 2, so I usually keep it much lower. The pool is clear, filters 8 hours a day, and is used at a moderate level. I confirmed the reading with test strips and by taking a sample to the pool store.
Is there a reason why a chlorine level would stay high for a long time like that?
thanks,
Ray