So far I'm seeing you post chlorine results from each night, but none from first thing in the morning so that you can tell how much chlorine you're actually losing to the algae. Some of the chlorine you're losing when testing at night only is being lost to the sun during the daytime, but the way to tell just how much the algae is consuming would be to test at night and again first thing in the morning, and then compare the two.

Janet