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Thread: Algae coming back?

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    leespiritwalker's Avatar
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    Algae coming back?

    Hello everyone! I am new to the BBB method and have recently opened my swamp with hopes to make it a sparkling oasis. I have read the instructions on this forum many times on how to shock and how to get rid of algae.

    But before I read all those helpful instructions, my hubby and I drained the green water from the pool and used a shop vac to get as much water out as possible, then we refilled. Almost immediately I noticed spots of algae all over the bottom. So I tried to vacuum it up several times thinking the filter would catch it all. Wrong!

    Then I came to this forum to search for help, and of course I found it!

    At this point I only had test strips to use for testing, but had ordered the TF100. While waiting for it to arrive, I began the shocking process because of time restraints. I had several bags of dichlor left from last year and started the shocking process with this. My FC was 0, my CYA was very low (close to 0) and my pH was around 7.5 so I thought dichlor would be ok temporarily. My CYA and pH didn't really change much. I received the TF100 on 5/9 and tested:
    FC - 10.6
    CC - .4
    CYA - <30
    I kept the FC at or above 10 and all other levels close to the same as above until 5/10 when I was away from home longer than I expected and the FC level dropped from 10 at 6:15am to 5.6 at 3:30pm. This was the first time I ditched the dichlor and started using bleach (6%). By 6:30am the next morning my FC had only dropped to 9.2, my CC was 0 (now officially love the bleach! ) and pH was 7.7. These levels have remained consistent since.

    Now my problem....I vacuumed today for the first time and noticed the dead algae that was light grey yesterday was now darker with a brown tint. When I cleaned the filter after vacuuming, the water coming from the filter was light brown when it was milky white before. The texture of some of the stuff coming out of the filter was sand-like but not as gritty. Is the algae coming back? I tested for everything tonight at 8:00 and here are the results:
    FC - 9.5
    CC - 0
    pH - 7.6
    CYA - 37
    TA - 90
    CH - 280

    The only other variance I can think of is the temp here went from 60's and 70's at night to 40's and 50's since I started the shocking process. The temp of the water has fallen from 82 to 73 in the last week.

    Any help is appreciated!
    Jenny Branscum
    Northeast Arkansas
    Intex 24' x 52" AG Pool
    12,481 gallons
    2500 Gallon Intex Pump w/ Cartridge Filter
    Taylor TF100 Test Kit

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    duraleigh's Avatar
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    Re: Algae coming back?

    Hi, Jenny,

    I think you have done everything just as you should. Brown is not typically associated with live algae....green is. You don't tell us how your water looks but I bet it is very clear....is that the case? (your test results look excellent!)

    It sounds like you need to vacuum, brush and filter to get the rest of the dead stuff out and then enjoy your swim season.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

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    Butterfly's Avatar
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    Re: Algae coming back?

    What Dave said^^^^

    Even tho you have been around for a while,
    I just want to add that you have an excellent understanding for someone with only two posts

    Welcome to the forum
    TFP Moderator TF100 Test Kit TF100 TestKit YouTube Channel PoolMath
    You're done SLAMing when:
    1)You lose 1ppm or less FC overnight, & 2)You have .5ppm CC's or less, & 3)your water is clear.

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    leespiritwalker's Avatar
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    Re: Algae coming back?

    The water is clear, but not sparkling....yet. It gets a bit cloudy when I brush it.
    Jenny Branscum
    Northeast Arkansas
    Intex 24' x 52" AG Pool
    12,481 gallons
    2500 Gallon Intex Pump w/ Cartridge Filter
    Taylor TF100 Test Kit

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    duraleigh's Avatar
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    Re: Algae coming back?

    It gets a bit cloudy when I brush it.
    That requires running the pump 24/7, more brushing, and cleaning the filter as necessary.....your pool will absolutely sparkle very soon if you will do that.
    Dave S.
    42k vinyl and concrete pool, 1.5hp pump, 140gpm filter
    TFTestkits , PoolMath , Pool School

  6. Back To Top    #6
    leespiritwalker's Avatar
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    Pleasant Plains, Arkansas
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    Re: Algae coming back?

    Been doing that too. The only time the pump has been off during this shocking process is when I clean the filter.
    Jenny Branscum
    Northeast Arkansas
    Intex 24' x 52" AG Pool
    12,481 gallons
    2500 Gallon Intex Pump w/ Cartridge Filter
    Taylor TF100 Test Kit

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