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Thread: Question about water loss

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    Question about water loss

    I know it haves been very hot lately 103 yesterday my water was 89F. I happened to see I had lost a small amount of water so I did a test. I got a 5 gal bucket and marked the water line half way up and set it by my pool also marked the water line on the pool with the pump off. I have my pump on a timer it runs from 10 am-2 pm off from 2 pm-6pm on from 6pm-10pm off the rest of the night until 10am the next day. Over the day the bucket lost about 1/8 inch of water the pool had no visible loss. I got up today and the pool level had dropped over night about 1/8-1/4 inch. Why would my pool only lose water at night. Its an above ground pool so I can see all plumbing pipes they have no leaks. Thanks for any help given!
    13500 gal 24 foot round x 4 foot deep above ground pool. Sand filter with 1.5 hp pump. City water

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    JasonLion's Avatar
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    Re: Question about water loss

    It probably didn't really only lose water at night, it just looks that way. It is often difficult to measure small changes in water level.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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    Re: Question about water loss

    What I did was took a piece of tape and put the edge of it at the very top of the water. I did the same thing in the bucket. I could tell the water was going down in the bucket but not the pool? Do you think 1/8 inch is too much for 24 hours?
    13500 gal 24 foot round x 4 foot deep above ground pool. Sand filter with 1.5 hp pump. City water

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    Re: Question about water loss

    Do you think 1/8 inch is too much for 24 hours?
    No perfectly normal...perhaps even a little less than average.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
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    Re: Question about water loss

    OK good. But I went out and look at the suction side of my pump and when it is off it is dripping at one of the threaded connections (easy fix I think/.hope). So that is most likely why I am only losing water at night ( the only time the pump is off for more than 4 hours streight). I am going to fix that and see what happens tonight.
    13500 gal 24 foot round x 4 foot deep above ground pool. Sand filter with 1.5 hp pump. City water

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    Mod Squad Bama Rambler's Avatar
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    Re: Question about water loss

    I bet that solves your problem.
    Dave J. TFP Moderator
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    Re: Question about water loss

    I got the leak fixed now we will see what happens tomorrow.
    13500 gal 24 foot round x 4 foot deep above ground pool. Sand filter with 1.5 hp pump. City water

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    Re: Question about water loss

    Well the water was still just a bit down form last night. But was wondering. I read that more water evaporates at night when the pool water is warm and the air temp drops. Could that be what is happening? Also When the water is moving from the pump it will evaporate slower right?
    13500 gal 24 foot round x 4 foot deep above ground pool. Sand filter with 1.5 hp pump. City water

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    Mod Squad Bama Rambler's Avatar
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    Re: Question about water loss

    I've actually seen it evaporate more at night than in the day.

    I'd run a bucket test to make sure it's just evaporation.
    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: Question about water loss

    I have been doing the bucket test sence sat morning and I lost 5/8 in the pool and 3/4 in the bucket. Sound about right for 3.5 days?
    13500 gal 24 foot round x 4 foot deep above ground pool. Sand filter with 1.5 hp pump. City water

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    Re: Question about water loss

    Sounds like there may be a tiny leak in the bucket!! Your water loss is fine and less than normal.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
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    Re: Question about water loss

    Thanks guys
    13500 gal 24 foot round x 4 foot deep above ground pool. Sand filter with 1.5 hp pump. City water

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    Re: Question about water loss

    Quote Originally Posted by duraleigh
    Sounds like there may be a tiny leak in the bucket!! Your water loss is fine and less than normal.

    What would be a "normal" water loss? It's been pretty warm her with little rain. It looks like I may be losing 1 to 1.5 inches per day.
    Craig Ramseur
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    Re: Question about water loss

    Can you cover the pool one night to see if it still loses water?
    26' X 52" Intex Ultra Frame. Intex Sand Filter
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    Re: Question about water loss

    Quote Originally Posted by PAGirl
    Can you cover the pool one night to see if it still loses water?

    Good Idea, PAGirl, Thanks!
    ...can't do it tonight because it's raining (I hate having to pump out the cover again once the pool is opened.)

    I'm doing the bucket test though.
    Craig Ramseur
    27600 gallon IG pool
    Hayward S244T sand filter
    Hayward Super II 3/4 HP pump
    Taylor TF100 Test Kit

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    Re: Question about water loss

    My pool appears to evaporate more at night as well. But when I bucket test I get the same amount of loss (now that I patched my leak).
    18k Inground Plaster pool / TriStar Variable Speed Pump and Controller
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