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    Confused FC 1.0 - 3.0 ppm or 5.0 -9.0

    Hi , my test kit it states ideal FC 1.0 - 3.0 however the pool calculator in the App is stating 5.0 -9.0.Which is it? My CYA is 50. All help much appreciated. steve
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    New and very confused

    Totally new to this- I have 17,000 gallon pool which is maintained by local pool company weekly. Never seen them sample water always 3 x 3 inch chlorine tabs left in skimmer weekly. Decided to test today with a Taylor K-2006C test kit. Followed instructions exactly and this is what I found: 1...
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    Best pool chemistry test kit

    Probably been asked a million times but really just getting started and looking for the best pool chemistry test kit to buy. Thanks!