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Thread: Liquid Bleach Safe for Vinyl Liner?

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    Liquid Bleach Safe for Vinyl Liner?

    I have a 15x30 above ground pool with a new replacement liner, not exactly sure what brand or thickness. I just want to verify that adding bleach is safe for the liner. It's probably a coincidence (pollen season?), but the last 2 times I added bleach (use Pool Math) to raise FC to 3 there was a spotty film on the surface like something flaky floating a few hours later. I've ordered the TF-100 for a more accurate reading, but I know the FC was .5 or 0 from the tester I have (almost clear test result). A few hours after testing, the FC was 3, the desired level.

    Anyone have any ideas?

    Thanks!

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    Casey's Avatar
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    Re: Liquid Bleach Safe for Vinyl Liner?

    Welcome to TFP! It is okay to use bleach as a lot of us who own vinyl liners do so. Add CYA/stabilizer to 30ppm to buffer the FC and you're good to go. The pollen is wild right now and probably what you are seeing on the water. Read Pool School. If you don't have CYA in your water yet you will lose all your chlorine pretty fast to the sun.
    I'd bet you my bikini you'll never get TFP water from a pool store!

    24' Sharkline Venture De Filter

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    Isaac-1's Avatar
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    Re: Liquid Bleach Safe for Vinyl Liner?

    You do want to be careful when adding bleach to pour it slowly in front of a running return, bleach is heavier than water and if you pour it too fast can sink to the bottom and still be in highly concentrated form which can damage the liner.

    Ike
    Indoor 20x40 35,000 gallon vinyl pool with 1.5 HP 2 speed Jandy FloPro pump, Hayward EC75 Perflex DE filter, 11 4x12 Techno-Solis solar panels w/ Aquasolar controller, Aquabot Turbo T Robot Cleaner. Also LMI metering chlorine dispenser pump and HotSpring Jetsetter
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    Re: Liquid Bleach Safe for Vinyl Liner?

    Got it, when TF-100 arrives I will test and adjust CYA.

    And yes, I poured very slowly at the return, 50 oz took about 2 minutes to complete.

    Something else and it's probably my imagination, but a few hours after adding the bleach, the water feels more viscous, almost like the feeling of hard water. But I don't have hard water and it doesn't feel like that all the time. I am just making this up?

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    Patrick_B's Avatar
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    Re: Liquid Bleach Safe for Vinyl Liner?

    You got it! Don't let anyone tell you bleach will harm a liner. A liner has no idea where the chlorine comes from.

    Welcome to TFP!
    TFP Moderator
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    Re: Liquid Bleach Safe for Vinyl Liner?

    Agree to all of above. Add in front of a return and I always throw my robotic cleaner in afterwards to help mix up the water and get the chlorine equally distributed.
    25K Gallon IG Vinyl Liner w/ concrete walls True "L" 16X32X16, Hayward EcoStar VS pump, Hayward Swimclear C4030 Filter, Hayward 21104T Heat Pro Titanium Heat Pump, Hayward Aqua Plus SWG + Automation, 2 Hayward Color Logic 4.0 LED lights, Polaris 9300 cleaner. TF-100 test kit.

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