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Thread: How long should pump be circulating before testing?

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    mickey4paws's Avatar
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    How long should pump be circulating before testing?

    I've always waited until after the pump had been on for about an hour or two before testing. Now that I have a timer (and my own test kit), I wonder if testing right when I turn the pump on or waiting a while really matters. Will a test on uncirculated water be different than when the pump has been running for a while? Thanks.
    IG 12' x 39' - 20k Gallons - Vinyl Lined - StaRite Cristal-Flo II 26" Sand Filter - Hayward SuperPump 1 hp - Dolphin Dynamic autocleaner - Lochinvar Energyrite gas heater - Aqua Rite SWCG T-15 - TF100 Test Kit - Skimlite Duallly 9016 pole (great pole)

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    JasonLion's Avatar
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    Re: How long should pump be circulating before testing?

    Yes, some of the numbers can vary when the pump has been off. It is good to run the pump for at least an hour right before taking a water sample.
    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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    mickey4paws's Avatar
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    Re: How long should pump be circulating before testing?

    Thanks, Jason, I appreciate the reply
    IG 12' x 39' - 20k Gallons - Vinyl Lined - StaRite Cristal-Flo II 26" Sand Filter - Hayward SuperPump 1 hp - Dolphin Dynamic autocleaner - Lochinvar Energyrite gas heater - Aqua Rite SWCG T-15 - TF100 Test Kit - Skimlite Duallly 9016 pole (great pole)

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