Wow! That's some high calcium hardness reading you've got! Have you been using cal-hypo to chlorinate with like forever or something? Use your test kit and run the calcium hardness test on your tap water.
Also, redo the CYA test but dilute the sample. Take one part pool water and one part distilled water and mix together. Then use this in the CYA test and multiply your result by 2. If you still get a reading of 100, repeat the test but do one part pool water with two parts distilled, test, multiply results by 3. This won't be super accurate with each dilution, but it is better than nothing and will at least give us a ballpark reading for your CYA.
Tell us what products you use on this pool --- meaning ingredients and not just 'shock.'
t's much easier to answer your questions, when we know something about your pool. We often 'waste' the first few posts back and forth collecting information. So, please complete our new Pool Chart form -- it takes about 30 seconds, but will save much more than that.Pool Chart Entry FormRepost with requested info and somebody will try and help you go from there.
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