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Thread: Determining Number of Gallons

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    Join Date
    Feb 2017
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    El Paso, TX
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    Determining Number of Gallons

    Renting a house in which the owners know nothing about the pool, including its gallons. I've been using a rough estimate of 16,000 suggested by another forum user, but I am having trouble getting my chemicals straight. The final readings, after adding chemicals according to PoolMath, are always higher ( i.e. FC should of raised to 5 but was at 6 or 7/ pH should of raised to 7.6 but it's 7.8 or 8)

    I have a free form pool with three different depths and a spillover spa. My question is, what is the best way to get an accurate amount of gallons and to determine the length and width of the pool?

    Thanks, Kelsey


    Plaster, 2 HP WhisperFlo Pump, DE Filter

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    Mr Bruce's Avatar
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    Re: Determining Number of Gallons

    The easy way is to adjust your volume based on the discrepancies you've already noticed, maybe going 500 gallons at a time.

    If you want to do it the "hard" way, here you go: A Chemical Way of Calculating Pool Volume
    32K gallon Plaster - CircuPool SJ-55 SWG - 1hp Hayward 2 speed Super Pump - Hayward S200 Sand Filter - TF100XL/K-1766
    Test Kits - Pool Math - Chlorine/CYA/Target/Slam Chart - Support TFP

  3. Back To Top    #3

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    Re: Determining Number of Gallons

    That's what I figured and have been doing. I believe I'm getting closer as the discrepancies are getting smaller and smaller.


    Plaster, 2 HP WhisperFlo Pump, DE Filter

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    Re: Determining Number of Gallons

    Quote Originally Posted by ChelseaSoccer View Post
    Renting a house in which the owners know nothing about the pool, including its gallons. I've been using a rough estimate of 16,000 suggested by another forum user, but I am having trouble getting my chemicals straight. The final readings, after adding chemicals according to PoolMath, are always higher ( i.e. FC should of raised to 5 but was at 6 or 7/ pH should of raised to 7.6 but it's 7.8 or 8)

    I have a free form pool with three different depths and a spillover spa. My question is, what is the best way to get an accurate amount of gallons and to determine the length and width of the pool?

    Thanks, Kelsey


    Sent from my iPhone using Tapatalk
    If Fcu goes to 6 plus instead of 5, I'd drop 1000 gal. 6 is 20 percent over 5 so decrease of 15-20 percent should be safe initially. Then500 next time if needed

  5. Back To Top    #5

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    May 2011
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    Re: Determining Number of Gallons

    Sorry. 2000 initially would be about 16 prrcent

  6. Back To Top    #6

    Join Date
    Feb 2017
    Location
    El Paso, TX
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    Re: Determining Number of Gallons

    Thanks for the feedback. I'll give it a go tomorrow and let you know.


    Plaster, 2 HP WhisperFlo Pump, DE Filter

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