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Thread: Crystal clear green water

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    Crystal clear green water

    Ok, my water has been kept on SLAM level for 19 days now and is still bright green. We can see the bottom of the pool but it is green . On my other post it was mentioned by chem geek that it could be iron in the water. I had actually had the water tested at the pool store and asked specifically to test for iron and copper. The lady ran a test, did a printout but it didn't show anywhere on the test printout so I asked if there were metals. she said oh...no metals, it just didn't print. I am now thinking maybe she didn't test it at all? Also when I uncovered the pool this year it was very dark green, on clearing I found a large orange colored rock in the middle of the pool ( thinking grandchildren threw it in) could that have added metals to the water? We have never before had metals but the pool is clear green.
    33 ft round x 52", vinyl
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    Mod Squad woodyp's Avatar
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    Re: Crystal clear green water

    I'd say if she ran the metals test it would automatically come up on the print out. They never miss an opportunity to sell somebody something!
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    JasonLion's Avatar
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    Re: Crystal clear green water

    Metals won't show up on the test when they in the form that colors the water.

    Try using a startup dose of sequestrant and/or lower the PH to around 7.2.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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    Re: Crystal clear green water

    Thanks for the qick responses! I'll try it today.
    33 ft round x 52", vinyl
    Hayward 1.5 hp pump
    sta-rite 2.18ft ,200 lb sand filter
    24500 gal.
    Hayward Salt & Swim3

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    Re: Crystal clear green water

    OK...pool store said 0 phosphates, 0 nitrates, 0 iron, 0 copper...

    my test results are FC 33, cc 0
    TA 40
    PH 8.3+
    CYA 25
    Do I just keep slamming? I know I need to bring the FC down...I had raised it due to lack of results...my bad...What do I do now?
    33 ft round x 52", vinyl
    Hayward 1.5 hp pump
    sta-rite 2.18ft ,200 lb sand filter
    24500 gal.
    Hayward Salt & Swim3

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    JasonLion's Avatar
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    Re: Crystal clear green water

    If the water is a completely clear transparent green and you have passed the overnight FC loss test, then stop SLAMing.

    The next time FC is below 10, test and adjust the PH down to around 7.2 to 7.5.

    FC levels will come down fairly quickly on their own. By tomorrow FC should be below 10, and the next day it will probably be back to normal levels.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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    Re: Crystal clear green water

    Will the water lose the green by getting the ph down? It's still bright green today...I still need to add salt (312 lbs) before turning on the SWG. If I have to drain the pool I don't want to waste the salt. Someone is coming over today to dump the salt in for me but I am worried about bright green water. It's like a pool full of Palmolive. Please advise...I am lost here
    33 ft round x 52", vinyl
    Hayward 1.5 hp pump
    sta-rite 2.18ft ,200 lb sand filter
    24500 gal.
    Hayward Salt & Swim3

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    JasonLion's Avatar
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    Re: Crystal clear green water

    The color means you have metals in the water. You can replace the water with metal free water, if any is available, and that will save you money in the long run. Or you can use sequestrant. I suspect that there are metals in your fill water, and you have no choice but use sequestrant, but that is just a guess and not for sure.

    The combination of lower FC level, lower PH, and sequestrant will get rid of the green for sure. However, you will probably need to keep replenishing the sequestrant for the rest of the season.
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    Re: Crystal clear green water

    Ok. Today I will add sequestrant. I have no other water available to me here, not to mention its a lot of water...I'll keep you posted. Thank you for your help here.
    33 ft round x 52", vinyl
    Hayward 1.5 hp pump
    sta-rite 2.18ft ,200 lb sand filter
    24500 gal.
    Hayward Salt & Swim3

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    Re: Crystal clear green water

    BTW, sequestrants based on HEDP, phosphonic acid, or phosphonic acid derivatives are the most effective. ProTeam's Metal Magic and Jack's Magic The Pink Stuff (regular), The Blue Stuff (fresh plaster), and The Purple Stuff (salt) are some of the top sequestrants. You can also find many other brands with similar active ingredients, some of which are noticeably less expensive.
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    Re: Crystal clear green water

    So do I need one specifically for salt water pools? Also specifically for vinyl liners? If my municipal pool water has metals wouldn't everyone here have the problem or does bleach add metals? I haven't added anything else to my water except tons of elbow grease, that is.
    33 ft round x 52", vinyl
    Hayward 1.5 hp pump
    sta-rite 2.18ft ,200 lb sand filter
    24500 gal.
    Hayward Salt & Swim3

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    Mod Squad woodyp's Avatar
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    Re: Crystal clear green water

    Bleach won't add metals and The Purple Stuff is the one you need.
    16x32x52" Steel Cornelius Miramar AGP Vinyl liner 13,100 gal. Buried 2 ft.
    2 Speed Hayward Power-Flo Matrix 85 g.p.m. 22" 250lb. sand filter hard plumbed
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    Re: Crystal clear green water

    What is "municipal pool water"? Did you fill the pool with the same water that runs through your house? If so, check your toilet tank. If it's all orange in there your water has iron in it. Most municipal water supplies don't have iron, though. Bleach doesn't add any metal.
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    Re: Crystal clear green water

    Yes it is the same water as the house from the city. No orange ever in the toilets. I have no clue where I could get metals from when we have had the pool 4, yrs with no metals. If it isn't metal will the sequestriant hurt anything?
    33 ft round x 52", vinyl
    Hayward 1.5 hp pump
    sta-rite 2.18ft ,200 lb sand filter
    24500 gal.
    Hayward Salt & Swim3

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    Re: Crystal clear green water

    Quote Originally Posted by CindyG1 View Post
    Yes it is the same water as the house from the city. No orange ever in the toilets. I have no clue where I could get metals from when we have had the pool 4, yrs with no metals. If it isn't metal will the sequestriant hurt anything?
    No. No different than spraying Lysol on a surface already free of germs.

    Bright green usually means copper... is there any chance someone could have tried killing algae with copper sulfate? No empty jugs of this stuff for ponds laying around?



    The color is quite similar to this, isn't it?
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    Re: Crystal clear green water

    No. No one puts anything in the pool except me. I never bought or used anything like that and the color is more of a lime green not a blue green.
    33 ft round x 52", vinyl
    Hayward 1.5 hp pump
    sta-rite 2.18ft ,200 lb sand filter
    24500 gal.
    Hayward Salt & Swim3

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    Re: Crystal clear green water

    Ok the algae remover was put in the water by a well meaning daughter in law... I went to take it back to walmart and it was gone. So I just went and bought metal stain and scale out at Home Depot. It says the chlorine has to be below 3 so I can't use it yet. The water should be beautiful if it works since it's really pretty now if it weren't green. I feel very relieved to know that the product was added even though I could gladly strangle her for doing it. She was pressure washing the house and figured shed just do that for me.. I did read the label at Walmart and the first ingredient listed is copper 3.3 percent. So now we know the rest of the story! Since the water test showed no metals can I safely assume it won't take too much to clear it out?
    33 ft round x 52", vinyl
    Hayward 1.5 hp pump
    sta-rite 2.18ft ,200 lb sand filter
    24500 gal.
    Hayward Salt & Swim3

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    JasonLion's Avatar
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    Re: Crystal clear green water

    You are on the right track.

    The metal test doesn't really tell you anything. When metals are in the form that colors the water they don't show up on the test.
    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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    Re: Crystal clear green water

    It's like a mystery novel in here! Glad you found the culprit. Hoping for the best for you.

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    Re: Crystal clear green water

    I love mysterys...but I'd rather not star in it! I'll keep you posted.
    33 ft round x 52", vinyl
    Hayward 1.5 hp pump
    sta-rite 2.18ft ,200 lb sand filter
    24500 gal.
    Hayward Salt & Swim3

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