Anyone not new to this site knows about the OCLT. Is there a similar daytime version? I ran the OCLT so I know my FC loss overnight. Now if I pick a typical summer day, could I test the FC at dawn and sunset without the SWG running to find the FC loss during the day? From there, use this information with PoolMath to find an initial setting for my SWG. After that, it's a matter of tweaking the SWG to get to where the FC generation is equivalent to the FC loss.