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Thread: Marcite pool,

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    Marcite pool,

    Our marcite pool keeps getting green on the walls and floor. It has been shocked , brushed, pool store chemicals, It just seems to be coming back every day. All test s are good by pool store. We are thinking the marcite needs to be redone? It is rough on steps and sides, could it be pitted and holding algae in the pitting?

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    Mod Squad JohnT's Avatar
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    Re: Marcite pool,

    The algae problem isn't your pool, it's your pool store. They don't know what they are doing.

    If you maintain sufficient chlorine in the pool, you won't have algae.

    Welcome to TFP! We can help you manage your own pool.
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    Re: Marcite pool,

    First time tested told me the chlorine was locked and had to super shock it. Did that. still no results it seems to clear up then it goes back to green walls , water is clear and beautiful.It just shows up on walls and steps. Green out tahen super shock again same results. I am so tired of this. Never had this problem and I have been taking care of pools for 40 years. Could it be the marcite?

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    Mod Squad JohnT's Avatar
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    Re: Marcite pool,

    Quote Originally Posted by ladygolfer18
    Could it be the marcite?

    No it couldn't. Almost certainly it is some combination of excess CYA and low chlorine.
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    Mod Squad zea3's Avatar
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    Re: Marcite pool,

    Could you post a current set of complete test results?
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    Re: Marcite pool,

    I will do it later, thank you

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    Re: Marcite pool,

    the READINGS ARE AS FOLLOWS Free Chlorine 0.6
    combined chlorine 2.0
    Ph. 7.2
    alkalinity 80
    Bromine 2.2
    I use stabilized tabs tricloro-s- triazinitrone 99.2 %
    We have a sand filter. Pool is about 13000 gallons

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    Re: Marcite pool,

    Also we live in Florida west coast.

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    Re: Marcite pool,

    CYA was high, emptied half the water out and refilled. Now water is green. Am afraid to add anything at this point, especially any chlorine with stabilizer.

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    Re: Marcite pool,

    Have been using Clorox all week for chlorinating but it is not holding chlorine level. Am waiting for my test kit to come. Will I have to empty it completely ?? Water is crystal clear but algae on sides. Not as bad as in the beginnings but is still there.
    I feel like I am just pouring money into the pool at this time.

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    Mod Squad Bama Rambler's Avatar
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    Re: Marcite pool,

    Until you get the good test kit you are just kinda pouring money into the pool. However, it is helping, if nothing else it's keeping it from getting worse. Once you get the good test kit you can get it under control.

    You won't have to empy your pool because of the algae but you may have to drain more because of high CYA. You'll have a much better handle on it once you can test it yourself. hang in there.
    Dave J. TFP Moderator
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    Re: Marcite pool,

    I finally got test kit and my husband to help. Here are the readings.
    FC=3.6 ppm
    CC=.8ppm
    PH=7.5
    TA=200ppm
    CH=180-200
    CYA=70
    Any help would be appreciated. Have been playing with this for 2 weeks now and every day the green comes back on the walls only. HELP

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    Re: Marcite pool,

    Use the 10 ml sample when testing it will save reagents and is perfectly accurate enough
    Nathan
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    Re: Marcite pool,

    Also please add your pool information to your signature line it will have an impact on what we suggest
    Nathan
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    Mod Squad Bama Rambler's Avatar
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    Re: Marcite pool,

    Now you can SLAM your pool correctly. Use the pool calc and enter the numbers you posted above and look at the bottom and find the shock level for your pool and raise the FC to that and test and adjust as often as you can. Every hour in the beginning is recommended.
    Dave J. TFP Moderator
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    Re: Marcite pool,

    You need to SLAM pool-school/shocking_your_pool your pool. This chart pool-school/chlorine_cya_chart_shock indicates you need to achieve and maintain a FC level of 28PPM. An initial dose of 471 ounces of 8.25% bleach will get you there for 13,000 gallons of water per http://www.poolcalculator.com/ .You then need to add enough bleach to get back to 28PPM anytime it drops below that, it could take an hour or more. You also need to brush the pool often during this process.
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    Mod Squad jblizzle's Avatar
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    Re: Marcite pool,

    Have you seen this chart: pool-school/chlorine_cya_chart_shock

    With a CYA of 70ppm (higher than our recommendation of 30-50ppm), the minimum your FC should ever be is 5ppm ... and that is after you have a clean pool. So you need to go through the SLAM process with a shock level of 28ppm or you need to replace more water to lower the CYA some more. [slam:2zmrkrhw][/slam:2zmrkrhw]


    WOW ... rediculous number of fast responses.
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    Re: Marcite pool,

    Thank you
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