free cl higher than combined cl

Chlorinating, maintaining the right chlorine levels,
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free cl higher than combined cl

Postby griffb1968 » Thu 21 Jun, 2007 14:16

my free cl is higher than combined cl so i would have a - total cl, what can i do

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Postby Buggsw » Thu 21 Jun, 2007 23:42

No, I think you may be using the wrong calculation.

TC = FC + CC

TC - CC = FC

TC - FC = CC

CC = bad chlorine/chloramines, what smells, stings your eyes and is ineffective at sanitizing.

FC = good chlorine

TC is the total of good chlorine plus bad chlorine.

What you need to do is to add more chlorine, at shock level, so that it gets rid of the CC. The goal is to have 0 CC.

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