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Thread: Loosing water very fast

  1. Back To Top    #1

    Join Date
    Jun 2015
    Staten Island, NY

    Loosing water very fast

    Hello everyone,
    Last weekend I opened up my in ground pool. Since then the water level dropped significantly. Here is the sequence of events.

    Last Saturday I put water pump on the turpentine cover to remove water from it. The water level was about one feet from the ground level. Pump run for about 2 hours then it started to rain, so I shut off the pump and went inside. It rained all night. However, in the morning I was surprised to see that all water is gone from the cover and the level dropped to about two feet from the ground level. At first I thought, eh... no big deal, probably "communicating vessels", as it looked like the other end of the hose was lower then the pump on the turp. Then I removed the cover, started water pump, dumped 18 gallons of chlorine in the pool, connected leaf bagger and started collecting leafs. After I was done with the leafs, I left water hose running to full up the pool.
    On Monday, I noticed water level dropped because skimmer was making noise by sucking the air. I refilled the pool with water and had water pump off over night.
    Here is a picture I took Tuesday morning.


    This is how it looks today.


    Also note wrinkles, it didn't look anything like that when I pulled off the cover.



    I was suspecting plumbing, but as the water level dropped below the return jets doesn't seem to be the case. I can't see any obvious damage to the lining.

    TF-100 kit says chemistry looks as follows:

    CL <.5
    pH 7.3 - 7.5
    TA: 50
    CH: 40

    Please advise.

  2. Back To Top    #2

    In the Industry

    Join Date
    Jun 2015
    Wildomar, California

    Re: Loosing water very fast

    The fast way to diagnose a pool leak is a bucket test. It's pretty foolproof. Turn everything off. Mark the water level in the pool. Find a large bucket, no leaks, fill and mark it's water level Use a large bucket like a 25lb 3" tab bucket. Wait 24 hours and compare water levels. If the pool level is less than the bucket, you have a leak. Of course, rain, or a dog drinking from the bucket would dis the test.

  3. Back To Top    #3's Avatar
    Join Date
    May 2014
    Georgetown, ON, Canada

    Re: Loosing water very fast

    you really put in 18 gallons of chlorine at once? seems like too much, whats your pool volume?
    32,000L Fibreglass Leisure Pools IG 12.5'x23'x5' Pump: AstralPools BX1 1.0HP
    Filter: AstralPools ZX-310 SWCG: AstralPools VX7T
    Heater: Hayward H250FDN Test Kit: TF-100

  4. Back To Top    #4

    Join Date
    Apr 2014
    Stony Brook, NY

    Re: Loosing water very fast

    Wow! That's a lot of water to lose. You have a serious hole somewhere. Maybe main drain.
    14000 gallon 16x32 roman in ground vinyl, Hayward 140k heat pump, swg, de filter 1 1\2 HP v.s. pump. Built in June 2014. Tf100 test kit.

  5. Back To Top    #5

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Sebring, Florida

    Re: Loosing water very fast

    That's a pretty robust leak. I would continue to let it drain to see where it stops. If it is still leaking when there is only 6-8 inches in the shallow end, I would start to refill so your pool doesn't get too low and call a leak detection guy if you don't finds it by then.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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