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Thread: Sneaky green won't leave me alone!

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    Sneaky green won't leave me alone!

    Hi everyone!
    I have poured over this site for a year now and have learned so much about pool ownership!

    I do however have one on-going issue.. Sneaky green alage! I Shock my pool, vacuum to waste 24 hrs later and enjoy a perfect pool for about 3 days... Then it creeps back in. I need to mention that my water is always crystal clear, however the alage can be seen growing in the corners etc. The thing that gets me is that the alage starts to grow while my FC levels are still high 12 ppm. Why is this happening? cYA is 45 on average.

    I feel like I'm getting all the alage when I brush/shock/clean, where is it coming from??

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    mrcarcrazy's Avatar
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    Re: Sneaky green won't leave me alone!

    How's the water circulation in those areas? can you improve it by re-aiming the jets?

    Now when you say "I shock my pool, vacuum to waste 24hrs later". this doesn't at all sound like what this forum suggests....SLAMing is what we suggest.
    http://www.troublefreepool.com/conte...tain-shockingl

    What are you using to obtain your chemistry readings? a full set of current test results would be helpful as well.
    IG gunite/plaster pool/spa Started 1/17/14, Plastered 5/16/14
    Size: 12'-21'x39' free form, depth ranging from 4' to 7, attached 6 person spa with spillover.
    Equipment: Whisperflo 2hp pump, Pentair 30" sand filter, Pentair Mastertemp 400k BTU heater, 1hp Whisperflo for waterfalls, and a blower for spa floor

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    Mod Squad woodyp's Avatar
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    Re: Sneaky green won't leave me alone!

    Your SLAM value for roughly 45 ppm cya is roughly 18---not 12.
    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
    Pool Rover Jr., Pool Blaster Max, Diver Dave TF100 Test Kit/Speed Stir
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    Casey's Avatar
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    Re: Sneaky green won't leave me alone!

    Have you passed the Overnight FC Loss Test?

    I have a feeling that you SLAM for a day and let it go. You have not eradicated the algae and that's why it keeps coming back.
    I'd bet you my bikini you'll never get TFP water from a pool store!

    24' Sharkline Venture De Filter

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    Mod Squad tim5055's Avatar
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    Re: Sneaky green won't leave me alone!

    Quote Originally Posted by Casey View Post
    Have you passed the Overnight FC Loss Test?

    I have a feeling that you SLAM for a day and let it go. You have not eradicated the algae and that's why it keeps coming back.
    TFP Moderator 39 X 18 23,000(ish) freeform gunite; built 2007ish; Pentair Triton II TR100 600lb Sand filter; 2 HP Pentair pump with 2.2 HP AO Smith single speed motor; 2 skimmers, 1 main drain, 4 returns w/waterfall, Stenner 45MHP2 3GPD running@ 60% - 15 gal Tank; heated by the sun CYA 200+ when I started - 50 now. Dolphin Supreme M5 Pool Cleaner. Hot Springs SX Spa, 285 gallon

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    Re: Sneaky green won't leave me alone!

    Thanks everyone - the SLAMing method is new to me so I will be trying this next. I will also be purchasing the test kit everyone recommends.

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    Richard320's Avatar
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    Re: Sneaky green won't leave me alone!

    Quote Originally Posted by Lexsis79 View Post
    Thanks everyone - the SLAMing method is new to me so I will be trying this next. I will also be purchasing the test kit everyone recommends.
    Now you're talking!

    This time around, shock it, shock it again, and keep shocking until it's all dead. And then if you maintain the chemistry using the suggested levels and your own test kit, you may never ever need to deal with algae again.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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    Re: Sneaky green won't leave me alone!

    Quote Originally Posted by Richard320 View Post
    Now you're talking!

    This time around, shock it, shock it again, and keep shocking until it's all dead. And then if you maintain the chemistry using the suggested levels and your own test kit, you may never ever need to deal with algae again.
    One more quick question before I am off to play with my pool: Considering my FC levels were around 14 this morning - how is Algae even present in my pool? This has boggled my mind since we took ownership of this pool!

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    Richard320's Avatar
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    Re: Sneaky green won't leave me alone!

    Quote Originally Posted by Lexsis79 View Post
    One more quick question before I am off to play with my pool: Considering my FC levels were around 14 this morning - how is Algae even present in my pool? This has boggled my mind since we took ownership of this pool!
    It depends on the CYA level. I took over my pool with 220+ CYA. To maintain active chlorine levels and avoid algae, I was targeting FC around 24. We had severe water restrictions in place, so a drain was out of the question.

    Hopefully this article will explain the CYA/FC relationship to your satisfaction.
    16K freeform gunite with spa; Pentair 4000 DE filter; Century Whisperflow 1 HP; Pentair Minimax heater.
    Troublefree does not mean Maintenancefree. It's like brushing your teeth: You can spend a couple minutes a day and pennies a week or go to the dentist once a year and spend several thousand dollars.
    A pool is like a pet - you have to feed it every day, even the days you don't want to play with it!

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    Butterfly's Avatar
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    Re: Sneaky green won't leave me alone!

    Algae has an opportunity to grow when FC levels drop below the minimum, based on the CYA level.

    You could not totally get rid of it in the past because you only tickled it with your short-lived high FC levels.

    To take control and eradicate it from your pool, you need to SLAM it and show it you mean business
    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.

    ~ One should not use a sledge hammer to swat a mosquito. ~

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