
Originally Posted by
chem geek
I forgot to add that with a hot tub you are sometimes fighting Combined Chlorine (CC) because some hot tubs are not exposed to sunlight. If that is your situation and you measure CCs consistently, then the regular (weekly) use of a non-chlorine shock (potassium monopersulfate) will prevent this, but it will also measure as CC itself unless you use the Taylor R-0867 reagent (found in kit K-2041). This same advice also applies to indoor pools where keeping CCs low is difficult.
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