Quote Originally Posted by mas985 View Post
One other thought. There are many "events" which can create excess chlorine demand such as pollen or even not killing all the algae after opening. So that could have accounted for the lower FC levels.
True. Pollen was really bad this spring.

At opening I did keep CL at shock level until CC was 0 and CL loss stopped dropping much overnight. This year it only took a couple days or so to get there. Previous years took longer and much more CL.

I found it interesting that over this past winter my CYA didn't drop at all, unlike previous winters were it plummeted. I understand the by products of CYA being eaten up create high CL demand. I guess that explains why I didn't need near as much CL at startup this season.