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I'm clearly doing something wrong with my CH test, as in the past 24 hours my results have ranged from 175-800 ppm despite no Ca additions or drains. I did back-to-back tests from the same larger sample last night and got wildly different answers, 550 and 800. This morning I got 175. Something...

My TF-pro salt arrived yesterday, and I have some questions. I have 2 testing agents, silver nitrate and chromate, that are not used in any tests, and I have no directions for a borate or salt test. Am I missing directions? Does this kit not test borates or salt? Do I need a supplemental test kit?

Hi Everyone, My fiberglass pool and tanning ledge are finally installed and leak-free, so now I'm a brand new pool owner with a ~24k gallon inground pool, SWG, hayward equipment, and very little idea what I'm doing. Lots of questions on my end, and lots of reading to do, but first I've got to...