Hi Waterbear,
Thanks for replying. I retested my Chlorine, I am using a DPD test. I had to dilute the water using 1.8ml pool/tap water. FC was 2.5, TC was 25 after multiplying. CYA was a "guess" since the black dot disappeared about 1/2 way to 100. Do you think I need to do a complete drain/refill?Thanks again.
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