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Thread: Gallons?

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    Gallons?

    Hello all, so how do I figure how many gallons is my pool?



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    Re: Gallons?

    Measure your pool, then use this: https://www.troublefreepool.com/calc.html
    12,000 gal Diamond Brite indoor​ pool. Pentair Triton TR-60 Sand Filter +added DE, Lochinvar Energyrite ERN-200 gas heater, Pentair Multi-valve, Pentair SuperFlo VS pump, TF-100 kit, Pool Math App - iOS

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    Richard320's Avatar
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    Re: Gallons?

    Break out the tape measure.

    If it's rectangular, round, or oval, poolmath can do the math for you, down at the bottom. If it's more freeform, then you'll need to make a sketch and get dimensions and depths and calculate it in sections.
    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.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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    Re: Gallons?

    Quote Originally Posted by Apokalo View Post
    Hello all, so how do I figure how many gallons is my pool?


    Sent from my iPhone using Tapatalk
    If you know the pool builder, they may have records. The previous owners left the pool builder's contact information. I just called them, gave my address and they looked it up...

    In ground, Pebble tec, 11,460 gallons, Hayward Cartridge Filter, Hayward Ecostar V.s. pump, Hayward gas heater, Installed sometime in 2012

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    Gallons?

    Thank you very much guys. You are rock stars!



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    Re: Gallons?

    A couple tricks I have used to figure out my pool in gallons.

    1.) If you ever decide to drain your pool, before refilling put the hose(s) that you use to fill your pool into a 5-gallon buck and determine how long it takes to fill the bucket. Then when you fill the pool, keep track of the time when you start and finish the fill. You can then calculate how many gallons your pool is based upon how long it took you to fill it up.

    2.) An even easier method is to determine size based upon how much your FC raised after adding chemicals. Using your test kit, test your water and log it all into the pool calculator. Do a best guesstimate as to the size of your pool. After testing, add the exact FC it tells you to add in order to get to your target FC. Circulate water for about an hour, then test your FC levels again and determine how much your FC level actually raised. Go back to pool calculator and under "Effect of Adding Chemicals" plug in the amount of chlorine you had added. Now play around to the pool size in the calculator until the "effects of adding chemicals" matches your actual change in FC level. I would do this at night, since you don't lose chlorine during the hour you circulate the pool. Also, try to use a fresh batch of chlorine.
    16,000 gallon in-ground pebble tec pool. Hayward SP3400VSP Eco-Star Pump, Pentair Triton 2 TR-100 sand filter, A&A 5-port in-floor pool cleaner, Pentair Intellibrite 5g color changing pool light, Polaris 965iQ Robotic Pool Cleaner, OG Pool Math Subscriber and most importantly a Taylor K-2006C test kit.
    Test Kits Compared
    | SLAM | Chlorine / CYA Chart |

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    Re: Gallons?

    Quote Originally Posted by spinPHD View Post
    2.) An even easier method is to determine size based upon how much your FC raised after adding chemicals.
    ....
    Also, try to use a fresh batch of chlorine.
    Glad you mentioned freshness of chlorine. In reality, I don't think you can draw accurate conclusions, because even "fresh" chlorine may not have been stored in ideal conditions, and may not reflect the strength printed on the bottle.
    15k in-ground plaster, Hayward C900 cartridge, 1.5hp Pentair SuperFlo VS pump, Hayward AQR15 SWG, Barracuda G2 suction cleaner, TF-100

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    borjis's Avatar
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    Re: Gallons?

    Quote Originally Posted by spinPHD View Post
    A couple tricks I have used to figure out my pool in gallons.

    1.) If you ever decide to drain your pool, before refilling put the hose(s) that you use to fill your pool into a 5-gallon buck and determine how long it takes to fill the bucket. Then when you fill the pool, keep track of the time when you start and finish the fill. You can then calculate how many gallons your pool is based upon how long it took you to fill it up.

    2.) An even easier method is to determine size based upon how much your FC raised after adding chemicals. Using your test kit, test your water and log it all into the pool calculator. Do a best guesstimate as to the size of your pool. After testing, add the exact FC it tells you to add in order to get to your target FC. Circulate water for about an hour, then test your FC levels again and determine how much your FC level actually raised. Go back to pool calculator and under "Effect of Adding Chemicals" plug in the amount of chlorine you had added. Now play around to the pool size in the calculator until the "effects of adding chemicals" matches your actual change in FC level. I would do this at night, since you don't lose chlorine during the hour you circulate the pool. Also, try to use a fresh batch of chlorine.

    This is EXACTLY how I figured out my pool capacity. The pool co swore it was 15k but it turned out to be 13k using both methods above.
    16x32 IG Vinyl, 13,000 Gals. Hayward S-244T sand filter, SP2810X15 pump
    (1.5 HP motor) Raypak PR266AEN (266k btu) gas heater. TF-100 Test Kit.
    Dolphin E10 Cleaning Robot.

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    Re: Gallons?

    Quote Originally Posted by jeffbrig View Post
    Glad you mentioned freshness of chlorine. In reality, I don't think you can draw accurate conclusions, because even "fresh" chlorine may not have been stored in ideal conditions, and may not reflect the strength printed on the bottle.
    It's not exact, but if you do it every so often you can fine tune it to be pretty close. I think with every test you run, the more you learn about your pool and that includes getting a better sense of the actual size. After all, even if you know the exact size of pool you're never going to know the exact concentration of every bottle of bleach you add.
    16,000 gallon in-ground pebble tec pool. Hayward SP3400VSP Eco-Star Pump, Pentair Triton 2 TR-100 sand filter, A&A 5-port in-floor pool cleaner, Pentair Intellibrite 5g color changing pool light, Polaris 965iQ Robotic Pool Cleaner, OG Pool Math Subscriber and most importantly a Taylor K-2006C test kit.
    Test Kits Compared
    | SLAM | Chlorine / CYA Chart |

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