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Thread: Perplexing Calcium Test Results

  1. Back To Top    #1

    Join Date
    May 2010
    Palm Springs area, CA

    Perplexing Calcium Test Results


    Thanks for all the wonderful post here. I recently purchased the TF100 test kit and am having some trouble with the calcium test.

    I initially tested at 170. Went to buy supplemental calcium at the pool store -- guy gave me a funny look. I guess the water here in the desert is typically high in calcium; asked if I have a water softener (I don't). Apparently most people have excessive calcium, not too little.

    So I added 4 pounds of calcium granules, and expected the calcium to go up to ~200. However, 3 days later there has been no change in the calcium test results, still 170.

    What can confound the test results? Has anybody had unusual test results like this?
    11,000 gallon in-ground pool/spa combo, pebble-tec, Sta-rite system 3 cartridge 300 sqft, Pentair Whisperflo WFDS-6 2 speed 1.5 HP full-rated, formerly Starite Max-e-Glas 2 HP up-rated single speed, Sta-Rite Max-E Therm natural gas heater. Jandy Aqualink RS Onetouch. Manual vacuum. Chlorine.

  2. Back To Top    #2
    svenpup's Avatar
    Join Date
    Nov 2009
    Sacramento, CA

    Re: Perplexing Calcium Test Results

    Did the color change to blue or purple? There is a fading endpoint issue discussed here.
    TFP Method Advanced Intermediate
    • 17,500 gallons - In Ground - Plaster - Hayward Swimclear 3020 Cartridge Filter - Sta-Rite Max-E-Glas Main Pump upgraded with A.O. Smith B2980 E-Plus New Centurion Two-Speed Motor - Polaris 280 Cleaner with Polaris PB4-60 Booster Pump - TightWatt2 Timer - Taylor K-2006 Test Kit - Pool Pilot Digital Nano SWCG

    Helpful Links: Pool School, BBB for Beginners, How to Shock ('s a process not a product), Chlorine/CYA Chart, Jason's Pool Calculator

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