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Thread: Adding CH turned pool green

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    Adding CH turned pool green

    I had a CH reading of 125. I added 18 pounds probably a little quicker than I should have. I also added a single bag of shock without about 15 minutes after. The water turned a translucent green about an hour later. Is this something I should be worried about? The water was pretty clear before.
    28K Gal. IG diving pool, 2 HP Hayward Northstar, Hayward SwimClear C4025, SWG, White Plaster

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    JasonLion's Avatar
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    Re: Adding CH turned pool green

    Try lowering the PH by about 0.2 and see if that improves things. Also, double check your FC level and make sure FC hasn't gone to zero recently.

    Is it possible that there is copper in the water? Copper typically comes from copper based algaecides and from copper heat exchange coils in heaters when the PH has been very low.
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  3. Back To Top    #3
    Guest

    Re: Adding CH turned pool green

    Pool turned green after adding chlorine? It's either copper which will color the water green, or if you have a blue colored pool, it could also be iron which causes a yellow color to the water that will look green against the blue background of the pool.

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    Re: Adding CH turned pool green

    My PH was 7.4 when this happened but I can try to lower it to see if that has any affect. I have added the shock once before with no affect on the color of the water.

    I have a white plaster pool so it doesn't sound like iron.

    I was interested if it was a know affect if you add Calcium rise and shock closely together.

    Thanks in advance.
    28K Gal. IG diving pool, 2 HP Hayward Northstar, Hayward SwimClear C4025, SWG, White Plaster

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    Re: Adding CH turned pool green

    I was interested if it was a know affect if you add Calcium rise and shock closely together.
    No. Cloudy water is fairly common under certain conditions but green color and adding calcium are unrelated.
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    JasonLion's Avatar
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    Re: Adding CH turned pool green

    Transparent green water right after adding chlorine is a known effect of having copper in the water. The calcium might have also contributed just a little, but if it is copper the calcium would not have had a significant effect. If there is enough copper to turn the water green then there is enough copper to cause some rather difficult to remove stains.

    If it is copper, lowering the PH should clear up the water very quickly. Longer term you should add some sequestrant to prevent the copper from staining and figure out where the copper is coming from and make sure no more copper gets in the pool.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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    Re: Adding CH turned pool green

    Some bags of "shock" contain copper - when you added "a bag of shock", what exactly was it?
    18k gal inground, everbrite finish, 505 sq ft; 1.5 hp two speed whisperflow; rheem 5100ti 100k btu heat pump; 3 sheer descent falls; DE filter; swg (cell out and using trichlor for now)

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    Re: Adding CH turned pool green

    I used HTH Sock It Shock 'N Swim (the middle on here http://www.archchemicals.com/Fed/HTH/Products/shock.htm). I added 2 quarts of muriatic acid tonight and will let the filter run for about an hour. Is there an easy way to test for copper or should I bring it by a pool store?
    28K Gal. IG diving pool, 2 HP Hayward Northstar, Hayward SwimClear C4025, SWG, White Plaster

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    Re: Adding CH turned pool green

    I had my water tested and it returned 0 copper. It did have an extremely high (over 2500) phosphate count. I will work on getting the phosphate down. I am still baffled as to the translucent green color. It has somewhat resided when I added more muriatic acid.
    28K Gal. IG diving pool, 2 HP Hayward Northstar, Hayward SwimClear C4025, SWG, White Plaster

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    Re: Adding CH turned pool green

    Like I said, if your pool has a blue finish the water might be yellow colored from iron and only look green. I would add some metal seqesterant and see if the color goes away. If it does it's a metal problem.

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    Re: Adding CH turned pool green

    When you say a blue finish, are you referring to the plaster color?
    28K Gal. IG diving pool, 2 HP Hayward Northstar, Hayward SwimClear C4025, SWG, White Plaster

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    Re: Adding CH turned pool green

    Hi,

    Yes, if your pool is plaster, WB asked if that plaster is blue color. He meant the background color of the pool shell material.


    Obi Wan, Assuming he has iron in his pool, 0.3ppm is the limit for health right ? But at what level can iron give color in water ?
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    Re: Adding CH turned pool green

    Quote Originally Posted by Boudreaux
    When you say a blue finish, are you referring to the plaster color?
    yes. See my first post in this thread.

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    Re: Adding CH turned pool green

    So I guess you missed my post about having white plaster.
    28K Gal. IG diving pool, 2 HP Hayward Northstar, Hayward SwimClear C4025, SWG, White Plaster

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    Re: Adding CH turned pool green

    Quote Originally Posted by Boudreaux
    So I guess you missed my post about having white plaster.
    Yep,which is why it is important to include info like that in your signature or to type it in every thread you post (it's impossibe to read and remember what is in every thread in this forum! Also, your stained white plaster thread was posted on Aug. 27 and this thread was started on Aug. 24! ), but I did see you thread about yellow to brown staining (the Aug 27 thread) which is also indicative of iron and the fact that you have a SWG and some pool salts used by builders can contain iron salts as anti caking agents (which is why I recommend solar salt).

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    Re: Adding CH turned pool green

    I will try the Vitamin E table and report results.

    I might have mislead lead to the color of the stain but it is brown, not any yellow.

    The staining started before the salt was added so we can rule that out as the culprit.
    28K Gal. IG diving pool, 2 HP Hayward Northstar, Hayward SwimClear C4025, SWG, White Plaster

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    Re: Adding CH turned pool green

    Quote Originally Posted by Boudreaux
    I will try the Vitamin E table and report results.
    Vitamin C, not E
    I might have mislead lead to the color of the stain but it is brown, not any yellow.
    Yellow to brown is indicative of iron staining, browon staining can indicate copper (as can blue, grey and black). Vitamin C will remove iron but often turns brown copper stains grey to black
    The staining started before the salt was added so we can rule that out as the culprit.
    You can rule out the salt but NOT the fill water.
    Try the Vitamin C and report back. If there were metals in your water and it already plated out as stain then your water WILL test negative for metals.

    I assume the discoloration does not just brush off?

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