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Thread: Loss test - at what point does the sun ruin your results?

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    Loss test - at what point does the sun ruin your results?

    When performing the overnight loss test at what point does the sun skew the results?

    I'm wondering if I can add chemicals around 8PM, test before 9 and wait to check in the morning until 6:30.

    Details: Currently the sunrise is 5:37 AM and sunset is 8:30 PM. My pool gets direct sunlight once it clears my neighbors tree, I would estimate that direct sunlight hits the pool around 7:30/8AM. Trees on the other side start to cut down exposure around 6-6:30PM.

    I could always try it and if I'm showing a loss I can try checking earlier the next day.. are there any guidelines on this?
    Aaron
    [ Vogue Vectra 24' AG | Hard plumb: Hayward Power-Flo Matrix 1HP 2-speed, 27" sand filter & Pentair MiniMax 100 NG | Taylor K-2006 | Central IL ]
    Powered by: TFP, PoolMath & TFTestkits

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    Join Date
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    Re: Loss test - at what point does the sun ruin your results

    On the Pool School reading I did when I was doing my swamp conversion it said morning test must be done before direct sunlight. I was doing mine at 6:30am (before work). Sun was starting to light up the sky a little but was an hour or more from pool direct sunlight.
    I have a Vinyl IG pool (21,200 gallons) with a sand filter.

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    Mod Squad Bama Rambler's Avatar
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    Re: Loss test - at what point does the sun ruin your results

    If there is any sun shining on the water you won't get an accurate test. So even if there are trees, if the sun can shine through them, it'll affect the test.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/¼hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
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    Re: Loss test - at what point does the sun ruin your results

    I was afraid that would be the answer. So basically at sunrise that is my last chance to check before the sun will render my test results useless... 5:37AM
    Aaron
    [ Vogue Vectra 24' AG | Hard plumb: Hayward Power-Flo Matrix 1HP 2-speed, 27" sand filter & Pentair MiniMax 100 NG | Taylor K-2006 | Central IL ]
    Powered by: TFP, PoolMath & TFTestkits

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