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Thread: How long can you wait after getting sample before testing?

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    another one's Avatar
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    How long can you wait after getting sample before testing?

    I tried searching for this answer, but "wait" gets lots of hits.

    So my pool water is cold - 63 degrees, and I want to let it warm up for about 4 to 8 hours so I can test CYA. So can I just wait and test everything or do I have to test pH, FC, etc. now and CYA later?

    Also, can you wait days before testing - like mail a sample to someone and have them do a test?

    Thanks as always.
    29,000 gallon, 18' x 44' Indoor plaster pool - 8'x'8 spa in corner. Well water, TF-100,
    pool cover, Pentair MasterTemp 400k btu heater, Jandy RS-4, 4 x 105 sq ft cartridge filters,
    Wisperflow WFE-4 1.0 HP pump for pool, WFE-6 1.5 HP pump for spa jets, MagnaSweep.

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    frustratedpoolmom's Avatar
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    Re: How long can you wait after getting sample before testing?

    No, you have to do the test fairly quickly.

    To warm up the CYA sample just run the bottle under warm/hot water.
    Helpful links: Pool School; CYA/Chlorine Chart
    24' round AG pool, 52" high, Raypak heater; Waterway 2 spd Pump;
    150 Sq ft. Clearwater Cartridge Filter; Former and DISSATISFIED "Pool Frog" owner
    http://www.PerfectlyClearPoolService.com

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    benavidescj's Avatar
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    Re: How long can you wait after getting sample before testing?

    What is the reason for warming the sample?
    Carlos
    Pool: 28,000 gallons IG; IC 40 SWG; Pentair 120 gpm cartridge filter; Marble finish; Pentair Wisperflow 1.5 hp; Polaris 360
    Spa: 350 gallon; Bromine
    How to shock your pool

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    Re: How long can you wait after getting sample before testing?

    To speed up the rate at which it forms the cloudy precipitate so that measuring after 30 seconds of mixing gives you a reasonably accurate result.
    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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    Richard320's Avatar
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    Re: How long can you wait after getting sample before testing?

    I don't think CYA will be affected by waiting, it's there or it isn't. pH will change with time. Try it yourself: take the reading as soon as you draw the sample. Then set the color block aside while you do the rest. See if it didn't move a little. Shake it up good, it will definately change. But I digress. Chlorine will dissipate with heat, sunlight, and air. So it should also be done fast. CYA endures. Oh, how I wish it would disappear on its own......
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
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    JasonLion's Avatar
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    Re: How long can you wait after getting sample before testing?

    FC, CC, and PH can all change fairly quickly if you leave the sample sitting. TA, CH, CYA, Salt, Borate all stay more or less the same when the sample is left sitting.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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    another one's Avatar
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    Re: How long can you wait after getting sample before testing?

    Thanks for all the info. I tested with fresh water and did the hot water bath to get it above 70 degrees. New pool heater showed up today, vent pipe is coming on Tuesday. So hopefully, we'll have a warm pool next week.
    29,000 gallon, 18' x 44' Indoor plaster pool - 8'x'8 spa in corner. Well water, TF-100,
    pool cover, Pentair MasterTemp 400k btu heater, Jandy RS-4, 4 x 105 sq ft cartridge filters,
    Wisperflow WFE-4 1.0 HP pump for pool, WFE-6 1.5 HP pump for spa jets, MagnaSweep.

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