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Thread: Help...Spots on vinyl liner

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    Help...Spots on vinyl liner

    The bottom of my pool vinyl liner has some irregular shaped stains. Some stains are larger in size than others. The stain color appears to be light to darker brown and brushing does not remove the spots.

    Does anyone have any insight as to potention issue and the cure? Thank you.

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    In the Industry
    duraleigh's Avatar
    Join Date
    Apr 2007
    Sebring, Florida

    Re: Help...Spots on vinyl liner


    Welcome to the forum. Could you post a set of test results for us to look at to see if there's any clues in them?
    Dave S. - Forum owner
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Re: Help...Spots on vinyl liner

    The only test result I currently have to share are from my own. I use the Frog chlorinating system so I don't get a chlorine reading, but I have the dial set to 4 1/2 which has done well over the past 4 years. PH is 7.6 and Total Alkalinity is 130.

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    frustratedpoolmom's Avatar
    Join Date
    May 2007
    SWSuburban Chicago, IL

    Re: Help...Spots on vinyl liner

    I can tell you 100% certainty the problem is very likely your pool has too high CYA and you don't have enough chlorine. As a former Frog user, you described my prior situation exactly. Read this article here.

    Here is my pool, 2 years ago, not long after I removed the Frog assembly from my system....

    These stains, that I had for 3 seasons, dissappeared from my pool within 3 months of switching to BBB, and have not returned.

    Here's what you need to do:

    1. Order one of the test kits discussed here. Order them online, unless you can find the K-2006 in a pool store (rarely have them - accept no substitute; TF100 only sold online and a better deal for the money IMHO). Having your own test kit is gonna save you a TON of money and a TON of frustration and headaches.

    2. Post a full set of test results, obtained from a Pool Store. DON'T BUY anything from them....just accept the printout and say you "need to think about it".

    This will get you started.

    (In the meantime, create a signature. Go to User Control Panel, then Profile, then Edit Signature. See our sigs for examples of the info we need.)
    Helpful links: Pool School; CYA/Chlorine Chart
    24' round AG pool, 52" high, Raypak heater; Waterway 2 spd Pump;
    150 Sq ft. Clearwater Cartridge Filter; Former and DISSATISFIED "Pool Frog" owner

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