Buggsw wrote:Well, your pool dealer is incorrect. Chlorine lock may be a poor term to use, however, it has been proven time and again that CYA levels that are too high reduce the effectiveness of chlorine. You get to a point that the "normal" ppm of chlorine is doing nothing for your pool. You will fight a losing battle and see faster recurrances of algae.
The more pucks and pool store shock you use, the higher the CYA will get, causing even more of a problem. Good luck with that.
Given that how often should one change the entire pool water content (or a significant fraction thereof?