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Thread: Algae after one week

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    Makdaddy's Avatar
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    Algae after one week

    So last Sunday the kids were in the pool and everything was fine clean and cool
    My FC today was 5 We took the solar cover off today (one week ) to find algae
    My CYA was down to 40. Not sure why the algae broke out at an FC of 5?????

    So my question
    I slammed to 16 with the CYA of 40
    Should I wait to raise the CYA after I slam for a few days? Or raise the CYA and raise the slam level?


    Why would algae take hold on an FC of 5 the Ph was at 7.2
    Im confused

    Thanks
    Greg
    --- Greg----
    24 x 54 Round Cozumel AGP with Grand Entrance Step 14500 Gal
    Running ntex Krystal Clear Saltwater System with E.C.O.
    A/G Cristal Flo II Sand Filter Tank w/ 2HP, 2-Speed Dynamo pump -Zeobest
    TFT Test Kit---Gorilla Floor and Foam Pool Cove--Half Deck

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    pwrstrk's Avatar
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    Re: Algae after one week

    You stated your CYA was down to 40. What was it before ?
    Jeff
    24'x54" AG Morada RTR (by wilbar) 13'500 gal. Hayward Powerflo Matrix 1hp 2 speed. Hayward Perflex EC65 DE filter.

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    Makdaddy's Avatar
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    Re: Algae after one week

    I was at 65 when I opened
    we have had some rain
    I try to keep it between 65 and 80 with the SWG
    I understand that the CYA will help hold the Fc level.
    --- Greg----
    24 x 54 Round Cozumel AGP with Grand Entrance Step 14500 Gal
    Running ntex Krystal Clear Saltwater System with E.C.O.
    A/G Cristal Flo II Sand Filter Tank w/ 2HP, 2-Speed Dynamo pump -Zeobest
    TFT Test Kit---Gorilla Floor and Foam Pool Cove--Half Deck

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    pwrstrk's Avatar
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    Algae after one week

    Here's what I'm thinking and I could be wrong.
    First are you confident with your CYA test ?
    If you are then with the CYA at 40 your weren't getting enough protection from the sun for your FC. Just by the nature of the way the SWG makes chlorine your FC may have slipped enough to have an algae outbreak.
    Regardless you have algae and you need to SLAM the pool. 😎
    Jeff
    24'x54" AG Morada RTR (by wilbar) 13'500 gal. Hayward Powerflo Matrix 1hp 2 speed. Hayward Perflex EC65 DE filter.

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    mickey4paws's Avatar
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    Re: Algae after one week

    I would recommend not leaving the solar cover on all the time too. Pools need to breath so to speak.

    IG 12' x 39' - 20k Gallons - Vinyl Lined - StaRite Cristal-Flo II 26" Sand Filter - Hayward SuperPump 1 hp - Dolphin Dynamic autocleaner - Lochinvar Energyrite gas heater - Aqua Rite SWCG T-15 - TF100 Test Kit - Skimlite Duallly 9016 pole (great pole)

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    Makdaddy's Avatar
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    Re: Algae after one week

    Quote Originally Posted by pwrstrk View Post
    Here's what I'm thinking and I could be wrong.
    First are you confident with your CYA test ?
    If you are then with the CYA at 40 your weren't getting enough protection from the sun for your FC. Just by the nature of the way the SWG makes chlorine your FC may have slipped enough to have an algae outbreak.
    Regardless you have algae and you need to SLAM the pool. 😎
    Yes The CYA was done with the TF Test Kit, Im confident on all of my test with this kit.
    The fact that I was maintaining a FC of 5 indicates that the SWG was doing its job a target of FC 5 should not allow Algae to grow from all that I have read on this forum. (SWG Pools)
    I have started the slam process
    I am looking for guidance as to raising the CYA before or after the algae is Defeated?

    - - - Updated - - -

    That seems odd
    How would leaving the solar cover on promote algae?
    --- Greg----
    24 x 54 Round Cozumel AGP with Grand Entrance Step 14500 Gal
    Running ntex Krystal Clear Saltwater System with E.C.O.
    A/G Cristal Flo II Sand Filter Tank w/ 2HP, 2-Speed Dynamo pump -Zeobest
    TFT Test Kit---Gorilla Floor and Foam Pool Cove--Half Deck

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    pwrstrk's Avatar
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    Re: Algae after one week

    Don't raise your CYA level now. 40 is good for the SLAM. After the SLAM is over then raise it to 70-80.
    Jeff
    24'x54" AG Morada RTR (by wilbar) 13'500 gal. Hayward Powerflo Matrix 1hp 2 speed. Hayward Perflex EC65 DE filter.

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    Re: Algae after one week

    +1 don't raise the CYA until after completing your SLAM.
    When you have the CYA at it's normal level of 70-80 are you attempting to maintain the FC level at 5 ??
    When you have the CYA raised back up you should be keeping 5-6
    ppm FC.
    '70s IG Vinyl 32K gal, Lazy L, Hayward SuperPump 1.5hp 120V, S240 Sand Filter W/DE
    Solar Blanket, Well Water, Borax Added, TF-100 tester. ? too cold
    1979, 275gal Conway Emerald Spa P-100-2, ES-2 Spa Pack, bromine floater, indoor
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    Makdaddy's Avatar
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    Re: Algae after one week

    Quote Originally Posted by kiss4afrog View Post
    +1 don't raise the CYA until after completing your SLAM.
    When you have the CYA at it's normal level of 70-80 are you attempting to maintain the FC level at 5 ??
    When you have the CYA raised back up you should be keeping 8-9ppm FC. If you were only keeping 5 that could be why. Likely it actually slipped below 5. Did you test last Sunday after the kids got out to see where it was at for chlorine ??
    I always try to maintain FC @ 5 , But I did not check it Sunday after the kids were in it, I did check Wed and it was maintaining @5
    8 to 9 seems high for my application?It may have slipped below 5 and the SWG brought it back to 5.
    Seems odd that the algae would start just on a dip.
    But maybe Ill be learning something new here.
    Ill maintain Shock with the CYA @40, After Its cleaned up Ill go back to 70 to 80 CYA
    Ill do more research on an expected level of FC to fend off the algae
    --- Greg----
    24 x 54 Round Cozumel AGP with Grand Entrance Step 14500 Gal
    Running ntex Krystal Clear Saltwater System with E.C.O.
    A/G Cristal Flo II Sand Filter Tank w/ 2HP, 2-Speed Dynamo pump -Zeobest
    TFT Test Kit---Gorilla Floor and Foam Pool Cove--Half Deck

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    Re: Algae after one week

    Sorry, I was looking at the wrong table. Keeping it in the 5-6 range is correct.
    '70s IG Vinyl 32K gal, Lazy L, Hayward SuperPump 1.5hp 120V, S240 Sand Filter W/DE
    Solar Blanket, Well Water, Borax Added, TF-100 tester. ? too cold
    1979, 275gal Conway Emerald Spa P-100-2, ES-2 Spa Pack, bromine floater, indoor
    TF-100, Best test kit - TFTestkits.net
    Please help keep the lights on, become a TFP Supporter!

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    Makdaddy's Avatar
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    Re: Algae after one week

    Quote Originally Posted by mickey4paws View Post
    I would recommend not leaving the solar cover on all the time too. Pools need to breath so to speak.

    Sent from my LG-VM701 using Tapatalk 2
    I stand correted
    looks like the solar cover may have been the culprit. I will be doing more research


    http://www.troublefreepool.com/threa...d-Solar-Covers

    http://www.troublefreepool.com/threa...lgae-after-all
    --- Greg----
    24 x 54 Round Cozumel AGP with Grand Entrance Step 14500 Gal
    Running ntex Krystal Clear Saltwater System with E.C.O.
    A/G Cristal Flo II Sand Filter Tank w/ 2HP, 2-Speed Dynamo pump -Zeobest
    TFT Test Kit---Gorilla Floor and Foam Pool Cove--Half Deck

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    mickey4paws's Avatar
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    Re: Algae after one week

    Quote Originally Posted by Makdaddy View Post
    I stand correted
    looks like the solar cover may have been the culprit. I will be doing more research


    http://www.troublefreepool.com/threa...d-Solar-Covers

    http://www.troublefreepool.com/threa...lgae-after-all
    Thanks for those links, I hadn't seen those posts. When I posted last night, all I thought was every time we've left the solar cover on for any extended length of time, the water would lose its sparkle, or an algae bloom would start. This summer we've left it off a lot more and our water looks great. Anyway, good luck with your problem and I'm sure you're pool will be looking great again soon

    Edit: Just wanted to mentioned you might need to turn your SWG up a bit if you decide to leave the cover off. I know with mine, I had to turn the SWG up as the sunlight was eating up my chlorine more quickly than when I had it covered.
    IG 12' x 39' - 20k Gallons - Vinyl Lined - StaRite Cristal-Flo II 26" Sand Filter - Hayward SuperPump 1 hp - Dolphin Dynamic autocleaner - Lochinvar Energyrite gas heater - Aqua Rite SWCG T-15 - TF100 Test Kit - Skimlite Duallly 9016 pole (great pole)

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    Makdaddy's Avatar
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    Re: Algae after one week

    Just to fill in the blanks
    What I thought I was fighting last year was zeobest (Sand) from my return (The brown streaks )
    I never had Algae.
    Just posting for those looking for solutions

    I bought a Blaster pool cleaner, it allowed me to trap what ever i had in a filter
    After examining the filter , we discovered it was not algae

    Hope this helps someone going forward
    --- Greg----
    24 x 54 Round Cozumel AGP with Grand Entrance Step 14500 Gal
    Running ntex Krystal Clear Saltwater System with E.C.O.
    A/G Cristal Flo II Sand Filter Tank w/ 2HP, 2-Speed Dynamo pump -Zeobest
    TFT Test Kit---Gorilla Floor and Foam Pool Cove--Half Deck

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    Patrick_B's Avatar
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    Re: Algae after one week

    If you do get Algae, there is only one reason. Lack of Free Chlorine. There are contributors, but this is the ultimate reason.
    TFP Moderator
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