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Thread: Calcium Hardness Test Using The Palintest Pooltest 9

  1. Back To Top    #1

    Join Date
    Oct 2008
    Bonita Springs, Florida

    Calcium Hardness Test Using The Palintest Pooltest 9

    I've been using this unit for testing my pool water and I have a question regarding the calcium hardness test. I have a plaster SWG pool. When testing for calcium hardness and waiting the recommended two minutes before testing, I get initial readings in 280 ppm CaCO3 range. If if then continue to push the "read" button, the reading will creep upwards 10 ppm each time I press the "read" button so that after many "read" pushes I will get a reading of 500 ppm over a 5 minute time period. My question is, is the very first reading I get the "real" number for testing purposes or is it an average over a 5 minute period or is it the last reading...? Also, should I be reading this test as ppm of CaCO3 or as ppm of CA? This is the only test in my series of tests that has this upwards creep of test results.


    SW FL, 19K IG with spillover & cage, Goldline Pro-Logic PS-8, Hayward Sense & Dispense, Hayward Swim Clear 4025, Hayward Ecostar VS pump, Stenner MA pump, Aquabot, Hayward Aquarite SWG, Palin Pooltest 9, Helicol Solar.

  2. Back To Top    #2

    Join Date
    Mar 2007
    San Rafael, CA USA

    Re: Calcium Hardness Test Using The Palintest Pooltest 9

    You should probably contact Palintest about this problem. My hunch is that the first reading, after waiting the recommended time before doing a reading, is the correct one. You could also compare the result against a known good test kit such as the Taylor K-2006 or the TF-100. As for units of measurement, Calcium Hardness (CH) is measured as ppm CaCO3 as is Total Alkalnity (TA).
    16,000 gallon outdoor in-ground 16'x32' plaster pool; Pentair Intelliflo VF pump; Pentair IntelliTouch i9+3s control system; Jandy CL-340 square foot cartridge filter
    12 Fafco solar panels; Purex Triton PowerMax 250 natural gas heater (200,000 BTU/hr output); automatic electric pool safety cover; 4-wheel pressure-side "The Pool Cleaner"

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