Thanks for the input.

Waterbear, I have CC of 1, but CYA of 0. PH and ALK are fine. Are you saying that when I get my CYA up to 60 or so that a FC level of 5 will take care of the CC, or will i need to shock to get rid of the CC initially? Of course I will check it once the CYA gets to a normal level, but I'm just curious.