Pool is crystal clear (even after being gone a week and having someone only add 2 cups of chlorine a day and only running the filter without the waterfall setting during the day).
We aren't losing FC at night...during the day we have about a 37% drop (from 23 to 14.5 over 11 hours). CC went from 1 to 2.
We have cleaned behind the lights and in the waterfall. Not sure how to clean the cover...we don't have a clean place big enough to lay it out.
Could the rock waterfall be affecting this?