Wow, Gretchen, looks like you've got this one under control!! GREAT job on doing your homework!! I just wanted to clarify something, though--in the chlorine readings above, you have FC and CC being the same. I'm assuming that you mean FC and TC? (free chlorine is available to fight, combined chlorine is already engaged in the fight, and total chlorine is the combination of the two). The goal is to have FC and TC the same, with CC being zero. I suspect that was just a typo, but wanted to be sure....

Welcome to the forum!!

Janet