I expected to use a lot of liquid chlorine for the first week or two of opening pool and purchased 2 5 gal carboys of 12 % liquid chlorine. But somehow magic happened, the stars aligned and my pool needed no more than a quick vacuum and running trichlor overnight for the stabilizer. By morning, I had 5 ppm running the chlorinator on full! At the moment, my chlorine demand is very low. I use the pucks until the CYA approaches 30 than switch to liquid. How long can I expect the chlorine in the carboys to retain potency?