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Thread: Stain in spa caused by ozonator or N2?

  1. Back To Top    #1

    Stain in spa caused by ozonator or N2?

    Hi everyone,

    Some time ago I decided to add an ozonator to my spa. I did so because I wanted to reduce the amount of chlorine use. However, after having the ozonator for over a year (replaced the chip a couple of months ago), I now notice a yellow stain on the tub wall (fiberglass). It appeared about a month ago. The stained area is across from where the ozonator ejects into the spa.

    However, about 8 months I also began using N2. About a month ago, I replaced it with a new cartridge. The water from the filter and N2 also comes out in the area where the ozonator ejects air.

    So I'm wondering what caused the stain, the ozonator, or something in N2?

    Any thoughts?

    Thanks

    Peter
    1250L (330 US Gal) Max Spa - Chlorine
    Owned and operated since 2001 and still learning . . .
    BBB beginner

  2. Back To Top    #2
    Guest

    Re: Stain in spa caused by ozonator or N2?

    Could be iron from your fill water that is being oxidized by the ozone. Hold a vitamin c tablet on the stain for about 30 seconds and see if it disappears under the tablet. Report back the results and we can take it from there.
    The N2 spa carts contain silver and zinc so they would not produce yellow stains but grey to black ones. Iron can produce yellow stains.

  3. Back To Top    #3

    Re: Stain in spa caused by ozonator or N2?

    Quote Originally Posted by waterbear
    Could be iron from your fill water that is being oxidized by the ozone. Hold a vitamin c tablet on the stain for about 30 seconds and see if it disappears under the tablet. Report back the results and we can take it from there.
    The N2 spa carts contain silver and zinc so they would not produce yellow stains but grey to black ones. Iron can produce yellow stains.
    Thanks waterbear,

    I appreciate the quick response. I will try that test after I acquire some tablets.

    Peter
    1250L (330 US Gal) Max Spa - Chlorine
    Owned and operated since 2001 and still learning . . .
    BBB beginner

  4. Back To Top    #4

    Re: Stain in spa caused by ozonator or N2? - update

    Hi all,

    I think I've discovered the source of the yellow stain. Last night we were in the spa and tried cleaning the stain by rubbing it with a white sponge. We could see some yellow on the sponge, so we tried rubbing the stain more aggressively. More of the yellow came off the tub wall. My son recalled that when I last replaced the ozonator chip, the clear tube going from the ozonator to the tub, was slightly yellowed, so we replaced the tube at that time.

    This morning I checked the clear tube. It was still slightly yellow, but it also appeared that there was condensation in the tube. I removed the tube and, using a q-tip, I swiped the inside of the tube. The substance on the q-tip is definitely yellow and also very sticky, like a heavy syrup. I'm going to assume that this is causing the problem. Not sure why the clear tube is breaking down the way it is. Perhaps I'm not using the right kind of tube material. For now, I've disconnected my ozonator and plugged the line going into the tub.

    I'm going read over the tips in this forum regarding spa maintenance, balancing, etc. Maybe I won't be needing the ozonator afterall.

    Thanks

    Peter
    1250L (330 US Gal) Max Spa - Chlorine
    Owned and operated since 2001 and still learning . . .
    BBB beginner

  5. Back To Top    #5
    Guest

    Re: Stain in spa caused by ozonator or N2?

    You need to use special ozone resistant tubing or it will break down! If you are using chlorine and not bromine you are possibly better off without the ozonator. (The N2 is another story altogether!)

  6. Back To Top    #6

    Re: Stain in spa caused by ozonator or N2?

    Quote Originally Posted by waterbear
    You need to use special ozone resistant tubing or it will break down! If you are using chlorine and not bromine you are possibly better off without the ozonator. (The N2 is another story altogether!)
    Thanks waterbear,

    I do use chlorine and I'm going to try using the tub without the ozonator.

    As per your comment, "The N2 is another story altogether!" . . . I took it out when I changed my water last week. Here's why: about a month ago I had done a fresh fill and added a new N2 cartridge. This is the third new cartridge over the past several months. However, this time I immediately noticed a strange odor. Hard to describe, but it smelled like something "sour". Others didn't notice it like I did, but I'm fussy. Anyway, for this recent fill I decided to leave out the N2, and the odd odor is gone. Anyway, is N2 helping or an unnecessary add on? I'm really trying to go with a "KISS" system that will give clean and effective results. I'm also considering the BBB method after my current chemicals have been used.

    Peter
    1250L (330 US Gal) Max Spa - Chlorine
    Owned and operated since 2001 and still learning . . .
    BBB beginner

  7. Back To Top    #7
    frustratedpoolmom's Avatar
    Join Date
    May 2007
    Location
    SWSuburban Chicago, IL
    Posts
    11,965

    Re: Stain in spa caused by ozonator or N2?

    KISS is the way to go and the N2 is an unneccessary add on. Some users report benefits in spas, but necessary, no.

    Glad to hear your positive update.
    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
    http://www.PerfectlyClearPoolService.com

  8. Back To Top    #8
    Guest

    Re: Stain in spa caused by ozonator or N2?

    for some info on mineral systems and other alternative sanitizers:
    alternative-sanitizers-and-chemical-free-pools-the-truth-t3025.html

    Also, the Australian government's take on ionizers and mineral systems is quite enlightening!
    http://www.apvma.gov.au/qa/poolspa_FAQ_May2005.shtml
    I just wish our own EPA was as diligent!

  9. Back To Top    #9

    Re: Stain in spa caused by ozonator or N2?

    Quote Originally Posted by frustratedpoolmom
    KISS is the way to go and the N2 is an unneccessary add on. Some users report benefits in spas, but necessary, no.

    Glad to hear your positive update.
    Thanks FPM , I will try without and see what happens. Will save me about $35 every 4 months . .

    Peter
    1250L (330 US Gal) Max Spa - Chlorine
    Owned and operated since 2001 and still learning . . .
    BBB beginner

  10. Back To Top    #10

    Re: Stain in spa caused by ozonator or N2?

    Quote Originally Posted by waterbear
    for some info on mineral systems and other alternative sanitizers:
    alternative-sanitizers-and-chemical-free-pools-the-truth-t3025.html Also, the Australian government's take on ionizers and mineral systems is quite enlightening!
    http://www.apvma.gov.au/qa/poolspa_FAQ_May2005.shtml
    I just wish our own EPA was as diligent!
    Thanks for the links waterbear.

    Wish I had stumbled into this forum much earlier. It would have educated me. I took a big risk being educated by local pool/spa vendors who often stressed, "You really need this and this and this, or else". Can't blame them for wanting to make a buck, but I get so many different stories and having been wasting time and money over the past several years.

    But better late than never for a positive change. I'm certain to find here . . .

    Peter
    1250L (330 US Gal) Max Spa - Chlorine
    Owned and operated since 2001 and still learning . . .
    BBB beginner

  11. Back To Top    #11
    launboy's Avatar
    Join Date
    Jun 2008
    Location
    S.E. Wisconsin
    Posts
    582

    Re: Stain in spa caused by ozonator or N2?

    Can't dd much to this thread, but your avatar is very interesting. Is there a story behind that one???

    Adam
    18' x 42" Intex Easyset Pool, with 16' x 52" deep end in the middle. Approx. 5500 Gal.
    Hayward Power-Flo LX 1 HP, 100# Jacuzzi Brand Sand Filter(Piped underground so it looks nice) 8)
    3 - 2' x 20' Solar Pool Heater Panels(roof mounted)
    Goin' on 9 summers...NOBODY thought it would last this long.
    Buried Portable Spa sharing pumps and water with pool (Almost complete project)

  12. Back To Top    #12

    Re: Stain in spa caused by ozonator or N2?

    Quote Originally Posted by launboy
    Can't dd much to this thread, but your avatar is very interesting. Is there a story behind that one???

    Adam
    Sure is Adam,

    It was about 5 years ago when I had an issue with my spa where I thought it needed "super cleansing". I was getting a reaction when using the spa, even after a fresh water change (which I do about once a month). Couldn't pinpoint the cause so I went to my local spa store. They said, "here, take this cleaner and add one cap-full to your spa and run the jets, it should super clean your spa". Not sure exactly what was in the bottle, but I followed the store's directions. Poured in a cap, ran the jets, stepped into the house, and in less than 5 minutes my daughter is screaming that the spa is buried under foam . . .

    I learned a lesson that day . . .

    Peter
    1250L (330 US Gal) Max Spa - Chlorine
    Owned and operated since 2001 and still learning . . .
    BBB beginner

  13. Back To Top    #13
    frustratedpoolmom's Avatar
    Join Date
    May 2007
    Location
    SWSuburban Chicago, IL
    Posts
    11,965

    Re: Stain in spa caused by ozonator or N2?

    LOL! That's just too funny
    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
    http://www.PerfectlyClearPoolService.com

  14. Back To Top    #14

    Re: Stain in spa caused by ozonator or N2?

    Trichlor Chlorine tablets should never be used in a portable spa. Dissolve rate, potency and the extreme low pH of this chemical can cause severe damage to the spa surface and components.

  15. Back To Top    #15

    Re: Stain in spa caused by ozonator or N2?

    Quote Originally Posted by Aidan Weisz
    Trichlor Chlorine tablets should never be used in a portable spa. Dissolve rate, potency and the extreme low pH of this chemical can cause severe damage to the spa surface and components.
    Thanks for that bit of info Aidan . . . but I believe you posted to the wrong topic

    Peter
    1250L (330 US Gal) Max Spa - Chlorine
    Owned and operated since 2001 and still learning . . .
    BBB beginner

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