I like to put Borax in the skimmer. Your chlorine will keep dropping because you don't have any stabilizer in the water. You'll need some to be able to maintain a residual chlorine level. Aim for a level of CYA (another name for stabilizer) of 30 ppm to start. Then you can maintain your chlorine level--FC (Free Chlorine) at between 3 and 6 ppm. How big is your pool? One gallon of 6% will raise the FC in 10,000 gallons by 6ppm. Figure accordingly.
Carl
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