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Thread: Info on Zinc Anodes

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    Join Date
    Mar 2008
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    Central VA
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    Info on Zinc Anodes

    Hey guys, I noticed at the end of last year (my first using SWG) that my rails and ladder were VERY hard to remove from the pool (almost 'stuck' to the fittings inside the 'holes'), and I did some research on this forum and elsewhere regarding issues with salt and different types of pool fittings.
    My PB built the pool without plans for my putting in a SWG, so although he did put in the titanium core heat pump and SS bolts for the ladder and rails, I'm afraid of trouble in the future with the metal fittings inside the 'holes' corroding. I'm also worried about my pool light, and the white painted fittings along the top edge of my pool rail are starting to peel.
    I kept my pool balanced per the recommendations here last year, including salt levels.
    I guess my question is, is some corrosion (i.e. the white paint peeling) normal?
    Secondly, I have seen 'zinc anodes' that are sold to connect to the pool light or ladder rails to 'protect against electrolysis'. Are these worth trying?
    Thanks
    Todd
    --------------
    Pool: 16x36, 16,800 gal., vinyl, sand filter, SWG & AquaCal Heat Pump
    Spa: Hot Springs Sovereign, 355 gal., ozone/ion
    The most helpful tool you'll ever have for your pool:
    http://www.poolcalculator.com/

  2. Back To Top    #2
    JasonLion's Avatar
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    May 2007
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    Re: Info on Zinc Anodes

    Paint is always going to peel. Paint doesn't last as long as other parts of the pool. Just about everything else you describe should be just fine for a very long time.

    If you want to try a zinc anode, you connect it to the bonding system and bury it in the ground. It is simple enough to try. We don't have much experience with them because they are not normally needed.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
    Creator of PoolMath and Pool Calculator. Other handy links: Support this site, TF Test Kits, Pool School

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    spishex's Avatar
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    Re: Info on Zinc Anodes

    I have two pools that had anodes installed by a pool store and long story short, they don't fix bigger problems.

    One pool was poorly bonded (especially the lights). The anode was installed to the bonding grid with the generator, pump, etc. The anode oxidizes quite a bit, but so do the lights still. No apparent change.

    The other pool has an aquarium installed at one end with a stainless steel faceplate around it. The steel was rusting due to either cheap bolts or exposed rebar. Anode installed, no change.

    I think they might be more useful if they're connected directly to whatever might be oxidizing, like the lights in the first pool, but I haven't tried such an installation. And for the second pool, there's really just no fixing poor materials and construction with an anode.

  4. Back To Top    #4

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    Re: Info on Zinc Anodes

    Also, if there is any aluminum connected to the bonding wire, you'll want to use a magnesium anode and not a zinc anode, at least to protect the aluminum.
    16,000 gallon outdoor in-ground 16'x32' plaster pool; Pentair Intelliflo VF pump; Pentair IntelliTouch i9+3s control system; Jandy CL-340 square foot cartridge filter
    12 Fafco solar panels; Purex Triton PowerMax 250 natural gas heater (200,000 BTU/hr output); automatic electric pool safety cover; 4-wheel pressure-side "The Pool Cleaner"

  5. Back To Top    #5

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    Re: Info on Zinc Anodes

    OK great, thanks for the help! I may just hold off and keep an eye on everything, rinse it regularly, etc.
    Todd
    --------------
    Pool: 16x36, 16,800 gal., vinyl, sand filter, SWG & AquaCal Heat Pump
    Spa: Hot Springs Sovereign, 355 gal., ozone/ion
    The most helpful tool you'll ever have for your pool:
    http://www.poolcalculator.com/

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