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Thread: Tannin staining

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    Join Date
    Mar 2015
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    Cantonment, FL (Pensacola Area)
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    380

    Tannin staining

    It's not algae, but this seemed like the best place to put the question.

    We are still using a pool service the previous home owners used. On their last visit he pointed out what he called "tanning stains". It took me awhile until I realized he meant "tannin". Even with him pointing it out I can't see anything other than the rubber seals where the stairs meet the vinyl liner, and it's still not all that much. He pointed out himself that whatever chemical he would use would be hard on the liner so he doesn't use it often.

    I'm sure some of it is personal preference as to when any stain becomes an issue, but for tannin stains is there any reason or need to do anything about it early, as opposed to waiting until it becomes an issue for ME (Or, more likely, my wife)? Being from Northern Wisconsin I'm more than familiar with tannin where many of our lakes, the Wisconsin River, and all reservoirs are as dark as can be from tannin. Our pool is in an enclosure as well so there should be little that could get in there other than maybe leaves on the enclosure and rain bringing it in.

    Now that it was mentioned my wife is worried, but I want to leave it alone. So, assuming it's tannin, is there any harm in leaving it until it bothers me or should something be done sooner? Honestly, the areas pointed out are stained only just enough to not be "white" so I'm looking for an excuse to not have more chemicals added to my pool
    Scott
    15,000 Gallons vinyl in-ground screen enclosed, Hayward Eco-star SP3400VSP, Hayward Aqua Logic PL-Plus, Hayward T-15 Salt Cell, Hayward S244T Sand Filter, Polaris 380 with booster pump, Hayward heat pump HP50HA. K-2006 kit.

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    Mod Squad woodyp's Avatar
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    Apr 2010
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    Re: Tannin staining

    Shouldn't get any worse-----but I'm betting wifey wins this one!

    Just take a trichlor tab and rub it over the area and see if it improves.
    16x32x52" Steel Cornelius Miramar AGP Vinyl liner 13,100 gal. Buried 2 ft.
    2 Speed Hayward Power-Flo Matrix 85 g.p.m. 22" 250lb. sand filter hard plumbed
    Pool Rover Jr., Pool Blaster Max, Diver Dave TF100 Test Kit/Speed Stir
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    duraleigh's Avatar
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    Re: Tannin staining

    If it is truly tannin, slightly elevated levels of chlorine will make it disappear in a matter of days. Sounds a bit more like iron stains which is a different thing. Got a pic?
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  4. Back To Top    #4

    Join Date
    Mar 2015
    Location
    Cantonment, FL (Pensacola Area)
    Posts
    380

    Re: Tannin staining

    Yep, I can get a picture For sure will hold off on anything being done until then. To ME it doesn't even look like anything to be concerned about, but like Woddyp said.... LOL
    Scott
    15,000 Gallons vinyl in-ground screen enclosed, Hayward Eco-star SP3400VSP, Hayward Aqua Logic PL-Plus, Hayward T-15 Salt Cell, Hayward S244T Sand Filter, Polaris 380 with booster pump, Hayward heat pump HP50HA. K-2006 kit.

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