With my test kit (hth 5-way) I can get a total chlorine level. I have been keeping it around 3.0 to 3.5. My CYA is at 30. I am not understanding the FC and why it is important. Is there a real need to know the FC and can I assume that when I check the chlorine levels that what is left in my pool at the end of the day is FC?

Meade