Become a TFP Supporter Pool Math Forum Rules Pool School
Results 1 to 11 of 11

Thread: Help identifying stains/scales

  1. Back To Top    #1

    Join Date
    Apr 2016
    Location
    Palm Harbor
    Posts
    4

    Question Help identifying stains/scales

    Hello,

    New to registering, but these forums have been invaluable in getting our new pool chemistry under control.

    We bought a house with a pool and we have this stain throughout. I was hoping someone could help identify this and suggest some ways to fix it.

    20160425_164910.jpg20160425_164842.jpg20160425_164828.jpg20160425_164835.jpg

    Any help would be greatly appreciated!

  2. Back To Top    #2
    smforte's Avatar
    Join Date
    Sep 2013
    Location
    Montgomery,Al
    Posts
    668

    Re: Help identifying stains/scales

    If you can temporarily place a chlorine tab on the stain and it lightens, it's organic or place ground up vitamin C in a sock and rub it on the stain. If it lightens it's metals. What test kit are you using? Post some test results and someone will be along to help you.
    Montgomery, AL
    27000 16 x 36 IG, Vinyl, Grecian, Hayward Sand filter, 1 HP Pentair whisperflo motor, Aqua Genie filter not by choice, no extra jets, Dolphin s300i robotic cleaner,Taylor K 2006 test kit, speed-stir which I couldn't live without!

  3. Back To Top    #3
    Mod Squad pooldv's Avatar
    Join Date
    Aug 2012
    Location
    DFW, TX
    Posts
    23,994

    Re: Help identifying stains/scales

    Please add your pool info to your signature so that we can better help you, more here, Pool School - Read This Before You Post
    TFP Moderator
    If TFP helped you or saved you money - Become a TFP Supporter! <--Click here
    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

  4. Back To Top    #4

    Join Date
    Apr 2016
    Location
    Palm Harbor
    Posts
    4

    Re: Help identifying stains/scales

    @pooldv Thanks! Signature updated, will get pump info later this evening.
    @smforte: Chlorine puck did nothing. Vitamin C did lighten it. See below for test results:

    FC 10
    TC 10
    pH 7.4
    TA 110
    CH 300
    CYA 60
    Tampa, FL 16000 gallon IG freeform gunite. Hayward DE Filter, Taylor K 2005 Kit.

  5. Back To Top    #5
    Mod Squad pooldv's Avatar
    Join Date
    Aug 2012
    Location
    DFW, TX
    Posts
    23,994

    Re: Help identifying stains/scales

    Ok, if vit C lightens it then it is metals. Either copper or iron.

    Are you on a well? Or city water?
    Do you add algaecide? That adds copper.
    Use a mineral system with copper ionization magic? That adds copper.
    Have a heater with a copper heat exchanger and low PH, below 7.0, for a while? That adds copper.

    Have your read this? Pool School - Metals in the Water and Metal Stains

    You can order this, Jacks Magic Stain Identification Kit JMSTAINID at Sunplay

    Or you can try this, Ascorbic Treatment to rid Pool of metal stains
    TFP Moderator
    If TFP helped you or saved you money - Become a TFP Supporter! <--Click here
    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

  6. Back To Top    #6
    smforte's Avatar
    Join Date
    Sep 2013
    Location
    Montgomery,Al
    Posts
    668

    Re: Help identifying stains/scales

    Pooldv has you covered! I should be a pro at AA treatments. I've done enough of them. Trick is afterwards keeping ph on the lower side, FC no higher than your target (any higher will release the metals back into the water) and plenty of sequestrant weekly. I use Jacks Magic.
    Montgomery, AL
    27000 16 x 36 IG, Vinyl, Grecian, Hayward Sand filter, 1 HP Pentair whisperflo motor, Aqua Genie filter not by choice, no extra jets, Dolphin s300i robotic cleaner,Taylor K 2006 test kit, speed-stir which I couldn't live without!

  7. Back To Top    #7
    Mod Squad YippeeSkippy's Avatar
    Join Date
    Jan 2012
    Location
    'burbs of Augusta, Georgia
    Posts
    6,481

    Re: Help identifying stains/scales

    ...and you also need a test kit that tests for CCs along with FC. Do you have that? You didn't mention, and the Taylor K-2005 does not.
    My Amazon Smile for November12K Fiberglass IG, Infinity 4000 automatic cover, SWCG, Hayward Sand Filter, Hayward 1.5 Pump, Doheny Discovery Robot, Savi Melody LED pool lights, outdoor speakers and other assorted doo-dads. Sundance Altamar Hot Tub.
    Our pool build--> Our Pool Solved Our Sloping Yard Skippy's Cheap Pool Cooler -->Skippy's New Fountain

  8. Back To Top    #8

    Join Date
    Apr 2016
    Location
    Palm Harbor
    Posts
    4

    Re: Help identifying stains/scales

    Awesome, thanks guys. I just ordered the Jack's Magic kit to see what it is. Should be interesting.

    Regarding the test kit. I thought the combined chlorine was just the difference between the total and free, yielding that chlorine that was currently tied up as chloramines. Is there a specific test for the chloramines or does the TF-100 and K 2006 simply have better resolution to determine the probably small concentration? If it is the ladder, would the suggestions listed on this thread (Updating Taylor K-2005 to K-2006) suffice?
    Tampa, FL 16000 gallon IG freeform gunite. Hayward DE Filter, Taylor K 2005 Kit.

  9. Back To Top    #9
    Mod Squad YippeeSkippy's Avatar
    Join Date
    Jan 2012
    Location
    'burbs of Augusta, Georgia
    Posts
    6,481

    Re: Help identifying stains/scales

    The Taylor K-2005 only tests chlorine up to 10ppm and that's only via a color matching tube, right? That's not how the FAS-DPD test works hence this is why its the one we trust.
    If you need to SLAM you need more than 10ppm and you need to be able to monitor the combined chloramines accurately.

    You can order the FAS-DPD test alone via TFTestkts.net
    My Amazon Smile for November12K Fiberglass IG, Infinity 4000 automatic cover, SWCG, Hayward Sand Filter, Hayward 1.5 Pump, Doheny Discovery Robot, Savi Melody LED pool lights, outdoor speakers and other assorted doo-dads. Sundance Altamar Hot Tub.
    Our pool build--> Our Pool Solved Our Sloping Yard Skippy's Cheap Pool Cooler -->Skippy's New Fountain

  10. Back To Top    #10

    Join Date
    Apr 2016
    Location
    Palm Harbor
    Posts
    4

    Re: Help identifying stains/scales

    Yeah, it has a color chart up to 10, however, I've been diluting the pool water (50:50) with distilled water and doubling the resulting values when I expect the values to be above 10 PPM, or when they hit 10. I do like the titration till color change aspect of the FAS-DPD compared to the color matching, that can get annoying. Thanks for the advice! Next on the list.
    Tampa, FL 16000 gallon IG freeform gunite. Hayward DE Filter, Taylor K 2005 Kit.

  11. Back To Top    #11
    Mod Squad pooldv's Avatar
    Join Date
    Aug 2012
    Location
    DFW, TX
    Posts
    23,994

    Re: Help identifying stains/scales

    It kind of looks like iron. If it is iron and you ever do precipitate the iron into the water and turn it brown grab some polyfill material and stuff it in the skimmer basket and it will filter out a bunch of the iron from the water.
    TFP Moderator
    If TFP helped you or saved you money - Become a TFP Supporter! <--Click here
    2012 build and pics, 20k gal gunite, black onyx pebblesheen, OK flagstone, IntellifoVS, cart filter w/Pleatco, IC40 SWG, Solartouch, 5 12'x4' solar panels, HP50HA heat pump, 8mil solar cover, borates, TF-100 test kit, SONOS, Doheny's Discovery Robot, hot tub on bleach

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •