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Thread: How much evaporation is normal?

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    Join Date
    Nov 2009
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    Katy, TX
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    How much evaporation is normal?

    Hello again...I am in the Houston area, where the summers don't wait for the June date. I have noticed an increase in salt ppm's and started to monitor the water level. 10 days ago, we had a good rain shower that filled the pool to the rim...today, (10 days later) i see a gap of about 1 inch. Is this reasonable evaporation or should I go to phase II (bucket test)?

    your comments are much appreciated !
    Inground with 7x7 spa (spillover)
    20k gal plaster (sunstone)
    pentair 3/4 hp (filter), 1 hp (spa), 1/2 hp (features)
    cartridge filter
    SWCG IC-40
    Polaris Platinum (with booster)

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    Mod Squad Bama Rambler's Avatar
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    SouthWest Alabama
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    Re: How much evaporation is normal?

    I'd say 1" in ten days is not only good but almost exceptional. We can lose ¼" per day around here easily.
    Dave J. TFP Moderator
    24' x 52" Round AGP. 2hp/hp SPL Power-Flo 2-speed pump. 200sqft Waterway Cartridge Filter. 45MHP2(3GPD) Stenner Peristaltic Pump
    Pool School ----- Pool Math ----- TF-Test Kit

  3. Back To Top    #3

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    Nov 2009
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    Katy, TX
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    Re: How much evaporation is normal?

    Woao..Thanks, I guess I can put my worries aside for now....Thanks for the reply..
    Inground with 7x7 spa (spillover)
    20k gal plaster (sunstone)
    pentair 3/4 hp (filter), 1 hp (spa), 1/2 hp (features)
    cartridge filter
    SWCG IC-40
    Polaris Platinum (with booster)

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    Ohm_Boy's Avatar
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    May 2007
    Location
    Orlando, FL
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    1,344

    Re: How much evaporation is normal?

    A bucket test is cheap... peace of mind is priceless.
    [center:1kpalu48]Helpful Links: Pool School | CYA/Chlorine Chart | Pool Calculator[/center:1kpalu48]

  5. Back To Top    #5

    Join Date
    Mar 2010
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    Spring, TX
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    Re: How much evaporation is normal?

    I am in Spring, TX and I noticed a lot of water missing due to evaporation. I did the bucket test and it showed nothing overnight. It makes me feel better as I have a Koi pond that is totally shaded and it is losing water at a slower rate, but is losing water.
    13,000 Plaster IG Pool approx
    Hayward C5030 Cart Filter
    Emerson 1081 EB653 1.0 HP 1.40 S.F. 3450 RPM
    Pool Calculator, Pool School, TF Test Kits

  6. Back To Top    #6

    Join Date
    Mar 2007
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    San Rafael, CA USA
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    Re: How much evaporation is normal?

    The bucket test for evaporation is something you should check over a 24 hour period on a typical day with sun (if that's normal). The evaporation rate can vary somewhat from day to night so you really need a 24-hour period for a reasonable test. This isn't like the chlorine demand test where you don't want sunlight to interfere.
    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"

  7. Back To Top    #7

    Join Date
    Nov 2009
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    Katy, TX
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    94

    Re: How much evaporation is normal?

    ok..thks for all your replies..I guess the test won't hurt...adding to the learning experience...

    srg
    Inground with 7x7 spa (spillover)
    20k gal plaster (sunstone)
    pentair 3/4 hp (filter), 1 hp (spa), 1/2 hp (features)
    cartridge filter
    SWCG IC-40
    Polaris Platinum (with booster)

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