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

Thread: Clear to Green within Minutes

  1. Back To Top    #1

    Join Date
    Jun 2015
    Location
    Holmen, WI
    Posts
    4

    Clear to Green within Minutes

    Hey all - 6 year pool owner but we just had the liner replaced in our 28' round. We filled with 6000 gallons of city water but that had to be trucked in to just set the liner in place. The rest was filled through our well (20300 gal total). Yesterday afternoon I started up the pump for the first time, filtering is done through an 18" sand filter. It cleared up the little bit of cloudiness in the pool throughout the night and I figured today would be a good day to start the chemical treatment. I'm planning on SLAMing the pool but wanted to make sure that this will help as the initial dose scared me.

    I put in around 2.5 quarts of 12.5% bleach plus a little bit of ph reducer as it was reading high at 8.4+. My full testing kit has not arrived yet (TP-100) so I don't have full numbers yet. Chlorine went to 5-7 or so which is what I was expecting but suddenly and within minutes the water started turning green. A couple hours later now and the PH is still a little high and chlorine stayed about the same but the color intensified more. I can still see the bottom but it just went to straight green color through the water.

    Our water does seem to contain a lot of iron, toilets and showers are stained and its almost undrinkable (taste only). The old liner even had some pockets where it stained brown and we couldn't get it out. Would this be the cause of the color? If it is do I need to worry about correcting this first and then worry about SLAMing the pool? Whats the best way to correct it?

    Any help is greatly appreciated. I can normally balance everything out on start up within a week but I never started with fresh water like this. Pictures from yesterday and today included for reference. Ignore the wife, she wanted to jump in yesterday against all my advice..
    Attached Images Attached Images

  2. Back To Top    #2
    Mod Squad JVTrain's Avatar
    Join Date
    Feb 2014
    Location
    Central Minnesota
    Posts
    5,079

    Re: Clear to Green within Minutes

    Metals can certainly present themselves as green/yellow when they are in the pool. Especially at lower pH levels when they are dissolved in the water. At higher pH, they tend to precipitate out of solution and are not visible. When you lowered the pH, the iron dissolved and became visible. If the problem persists, you might have to use metal sequestrants to keep the metals in solution and prevent staining. But they have to be added routinely, not a one time fix. If it were me, I'd do everything I could not to use the well water that contains metals as it will always be an ongoing problem. It can be managed with pH and sequestrants but for the long run, you would have been better served filling with city water as much as possible.
    Joel - TFP Moderator - Minnesota - **Become a TFP Supporter!** Helpful Links: ABCs of Pool Water Chemistry - SLAM Procedure - Chlorine/CYA Chart
    40x20 Pool: 32K Gallons * Vinyl * Bleach Chlorination * Hayward S270T Sand Filter * Pentair SuperFlo 1 HP * Teledyne/Laars Heater * AquaVac Tigershark * TF-100 w/ SpeedStir
    Isolated Spa - 345 Gallons

  3. Back To Top    #3
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Location
    Tucson, AZ
    Posts
    37,389

    Re: Clear to Green within Minutes

    Welcome to TFP!!!

    Joel, I think you got that backward ... the metals appear in the water at higher pH levels and stay clear in solution at lower pH levels. {although now you have me doubting myself }

    The metals turn the water to yellow/green when you added the bleach which raises the pH some.

    Hopefully a lot of the metal will filter out, but as said above, you likely will need to start to use sequestrants. See: Pool School - Metals in the Water and Metal Stains
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

  4. Back To Top    #4
    Mod Squad JVTrain's Avatar
    Join Date
    Feb 2014
    Location
    Central Minnesota
    Posts
    5,079

    Re: Clear to Green within Minutes

    Quote Originally Posted by jblizzle View Post
    Welcome to TFP!!!

    Joel, I think you got that backward ... the metals appear in the water at higher pH levels and stay clear in solution at lower pH levels. {although now you have me doubting myself }

    The metals turn the water to yellow/green when you added the bleach which raises the pH some.

    Hopefully a lot of the metal will filter out, but as said above, you likely will need to start to use sequestrants. See: Pool School - Metals in the Water and Metal Stains
    Dang it, you're right! My brain has been swirling around the drain too long today! HIGH pH makes the metals visible, LOW pH makes them go back into solution. Thanks for the gentle nudge, J.
    Joel - TFP Moderator - Minnesota - **Become a TFP Supporter!** Helpful Links: ABCs of Pool Water Chemistry - SLAM Procedure - Chlorine/CYA Chart
    40x20 Pool: 32K Gallons * Vinyl * Bleach Chlorination * Hayward S270T Sand Filter * Pentair SuperFlo 1 HP * Teledyne/Laars Heater * AquaVac Tigershark * TF-100 w/ SpeedStir
    Isolated Spa - 345 Gallons

  5. Back To Top    #5

    Join Date
    Jun 2015
    Location
    Holmen, WI
    Posts
    4

    Re: Clear to Green within Minutes

    I just backwashed as well just to see what the filter was pulling and I'm hoping that a lot of this will filter out... solid brown. I'll keep working the PH down and see if that helps some with the clarity otherwise we'll try the sequestrant route. Thanks everyone!
    28' AG Dougboy, 20,300 Gallons, Hayward Power-Flo Matrix 1HP, Hayward 18" S180T92S, Well Water only
    TF-100 On The Way

  6. Back To Top    #6
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Location
    Tucson, AZ
    Posts
    37,389

    Re: Clear to Green within Minutes

    I am not 100% sure on the following advice: You may not want to lower the pH too much right away so you can get more of it filtered out.
    Although there is a risk of pool staining if you leave the pH high without sequestrant.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

  7. Back To Top    #7

    Join Date
    Jun 2015
    Location
    Holmen, WI
    Posts
    4

    Re: Clear to Green within Minutes

    Quote Originally Posted by jblizzle View Post
    I am not 100% sure on the following advice: You may not want to lower the pH too much right away so you can get more of it filtered out.
    Although there is a risk of pool staining if you leave the pH high without sequestrant.
    I just checked the pH again, we're at 7.9 or so. Do we think that would be low enough to let it sit and just try to SLAM and filter for a couple days?
    28' AG Dougboy, 20,300 Gallons, Hayward Power-Flo Matrix 1HP, Hayward 18" S180T92S, Well Water only
    TF-100 On The Way

  8. Back To Top    #8

    In the Industry

    duraleigh's Avatar
    Join Date
    Apr 2007
    Location
    Sebring, Florida
    Posts
    30,077

    Re: Clear to Green within Minutes

    I don't think I would SLAM that pool. It seems pretty certain metals are staining your pool and SLAMming really doesn't address that issue.

    Since your iron has precipitated, I would tend to lean with jblizzle and see if you can get as much as possible out.

    I think if it was me I would keep that pH right about where it is and let the filter catch that iron. You really need to think about finding another resource for water as that iron will haunt you as long as you pull from that well.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  9. Back To Top    #9
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Location
    Tucson, AZ
    Posts
    37,389

    Re: Clear to Green within Minutes

    Yeah, there is no reason to SLAM the pool or elevate the FC higher than recommended depending on your CYA level: See FC/CYA Chart.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

  10. Back To Top    #10

    Join Date
    Jun 2015
    Location
    Holmen, WI
    Posts
    4

    Re: Clear to Green within Minutes

    So filter and sequesterants it is?
    28' AG Dougboy, 20,300 Gallons, Hayward Power-Flo Matrix 1HP, Hayward 18" S180T92S, Well Water only
    TF-100 On The Way

  11. Back To Top    #11
    Mod Squad jblizzle's Avatar
    Join Date
    May 2010
    Location
    Tucson, AZ
    Posts
    37,389

    Re: Clear to Green within Minutes

    No sequestrant yet ... try to filter as much out as possible.
    Jason, TFP Moderator
    18k IG pebblesheen pool, Hayward ProLogic P4 w/ T-15 SWG, Pentair 1HP 2-speed Superflo, Hayward 6020 DE filter
    500 sqft Heliocol solar panels, ThePoolCleaner, TF-100 test kit w/ SpeedStir
    Pool School + Test Kit + PoolMath = A TROUBLE FREE POOL
    If you found TFP helpful and we saved you money ... Become a TFP Supporter!

Posting Permissions

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