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    Circupool vs TFP recommended CYA level

    I just noticed a discrepancy between the CYA level recommendation of Circupool of 30-50 ppm, vs the recommendation of TFP of a CYA of 70-90 for a SWG pool. In the past, I've been following TFP's recommendation, but my CYA level has now fallen over the winter to 40ppm, so I was about to add CYA...
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    Why does my spa require so much chlorine???

    I have a 400 gal spa with an ozonator. The spa is reasonably balanced with a pH of 7.6, TA=55, CH=155, CYA of 80. I increased the CYA to that level because of my chlorine problem, but it didn't seem to make a difference. The problem is that I need to put in 8 times the amount of 12% liquid...
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    How Much Salt Is Too Much???

    I made the tragic error of believing Leslie Pool Supply's measurement of my salt levels as I added salt for use with a newly installed SWG (Core55). Based upon their 3 measurements as I added salt, I should have ended up at a level of 3500ppm. I then bought a salt water meter from Amazon to...
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