Ok,
One person says to keep the CL (Is this TC?) at 20 ppm and one says don't go below 3.5 FC. I am assuming they say the same thing so I will ask the question I have related to the bleach calculator. The bleach calculator has a ppm increase field but I don't know how to calculate what my existing ppm is. Can you tell me how to use my numbers above to figure out the current ppm so I can enter the ppm increase in the ppm calculator ?

Thanks