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Thread: "season open" vs algae bloom

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    "season open" vs algae bloom

    What is the difference between taking the cover off & shocking to clear as opposed to having a balanced pool, then getting an algae outbreak?? It would seem clearing an algae bloom is a much longer process than a fresh season opening.

    Am I missing something??

    Thx!
    28,600 gal, IG vinyl, St. Louis, MO - Installed: 09/2012
    Pump: 1.5 hp Pentair Challenger, Filter: Pentair TR-100 sand, SWG: IntelliChlor (Pentair) Vac: 2-wheel The Pool Cleaner, Test Kit: TFT100 kit, Salt Test: Taylor sodium chloride drop test.

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    JasonLion's Avatar
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    Re: "season open" vs algae bloom

    There are several variables that affect how easy it is to clean up algae. One big one is water temperature. Algae grows much more slowly in cold water, so it is simpler to kill in the early spring when you are first opening. Another factor is how quickly you catch the problem before it turns into a full algae bloom. When you are just opening the algae will not have been getting much light, and so is rarely very advanced. Meanwhile, in mid-season this varies a great deal depending on how much attention you are paying to the pool. The earlier you start treating algae, the easier it is to kill.
    19K gal, vinyl, 1/2 HP WhisperFlo pump, 200 sqft cartridge filter, AutoPilot Digital SWG, Dolphin Dynamic cleaning robot
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    Smykowski's Avatar
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    Re: "season open" vs algae bloom

    Did that answer your question? To be honest, I'm not really sure what you're asking.
    33' round, 23,000 gal AG vinyl , 1HP 2spd PowerFlo Matrix downsized with 3/4HP impeller (X2), Hayward S180T 150# sand filter (X2), Hayward H250 NG heater Pool Store year 1 - $850 for 2 months; Pool Store year 2 - $440 for 2 months, TFPC year 1 - $170 for 4 months; TFPC year 2 - $95 for 4.5 months
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    Re: "season open" vs algae bloom

    Yes, I think it does help me understand a bit. My question stems from a slight jealousy of our neighbor's pool. We opened ours a few weeks ago, had a balanced pool, then apparently had an algae outbreak Monday night. We've been working to get it cleared up ever since.. including testing with an almost good test kit. We are about 75% cleaned up. Our neighbors took their cover off Wednesday night & will be swimming tomorrow... and they don't even test their water. They just shock the heck out of it.

    Yes.. I'm a bit bitter. LOL
    28,600 gal, IG vinyl, St. Louis, MO - Installed: 09/2012
    Pump: 1.5 hp Pentair Challenger, Filter: Pentair TR-100 sand, SWG: IntelliChlor (Pentair) Vac: 2-wheel The Pool Cleaner, Test Kit: TFT100 kit, Salt Test: Taylor sodium chloride drop test.

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    Smykowski's Avatar
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    Re: "season open" vs algae bloom

    Don't be. The "shock it once a week" method is basically blind luck. The neighbors will have algae come labor day while you swim into the fall.

    The fact that you got an outbreak is an indicator of something not right, though. Do you have a set of test results?
    33' round, 23,000 gal AG vinyl , 1HP 2spd PowerFlo Matrix downsized with 3/4HP impeller (X2), Hayward S180T 150# sand filter (X2), Hayward H250 NG heater Pool Store year 1 - $850 for 2 months; Pool Store year 2 - $440 for 2 months, TFPC year 1 - $170 for 4 months; TFPC year 2 - $95 for 4.5 months
    The most important article on this site - The ABCs of Pool Water Chemistry

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    Re: "season open" vs algae bloom

    Well, sorta. The FAS-DPD part is coming in the mail.. probably Tues/Wed. But the results I got this AM are as follows:
    FC: 25+ (diluted method.. the pink matches the 5, so I multiply by 5.. but it could be 30.. could be 50. )
    pH: 7.5
    TA: couldn't get this test to work.. my 'green' was more teal.. and my 'red' was yellow. But it turned yellow at 90.
    CYA: 55
    28,600 gal, IG vinyl, St. Louis, MO - Installed: 09/2012
    Pump: 1.5 hp Pentair Challenger, Filter: Pentair TR-100 sand, SWG: IntelliChlor (Pentair) Vac: 2-wheel The Pool Cleaner, Test Kit: TFT100 kit, Salt Test: Taylor sodium chloride drop test.

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    Re: "season open" vs algae bloom

    When you have high FC, the TA test goes from Blue-Yellow instead if Green-Red. The result is still valid.
    John
    7 year old ~13,500 gal 24' AGP with 1.5 hp Proline pump, 150 sqft Pleatco cartridge, filled with well water with pH of about 4.5.
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    BoDarville's Avatar
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    Re: "season open" vs algae bloom

    Quote Originally Posted by Smykowski
    The neighbors will have algae come labor day while you swim into the fall.
    Cathy9887, don't be bitter. The scenario that Smykowski mentions played out in our neighborhood two years ago. That August, virtually everyone that has a pool in my neighborhood had a "red algae" outbreak. What is referred to as "red algae" is actually a bacterium, but it is caused by the same thing that causes a true algae bloom...letting FC get too low for your pool's CYA. Fortunately for me, I had discovered this forum and Pool School at that time.

    Your neighbors may be swimming now, but if they use the traditional trichlor pucks and dichlor "shock" all summer long, they are setting themselves up for potential issues down the road. You, OTOH, will be following the methods that we teach and your pool will clear up and be much easier to maintain going forward, regardless of what anyone else is doing. Won't be long before they are asking you how you keep your pool so sparkling!
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  9. Back To Top    #9

    Re: "season open" vs algae bloom

    Good to have that confirmed.. I kinda thought (hoped) that, so I went ahead & made note of the number.

    At this point, should I even worry about or check the TC and/or the CC??

    Thanks, Bo!!
    28,600 gal, IG vinyl, St. Louis, MO - Installed: 09/2012
    Pump: 1.5 hp Pentair Challenger, Filter: Pentair TR-100 sand, SWG: IntelliChlor (Pentair) Vac: 2-wheel The Pool Cleaner, Test Kit: TFT100 kit, Salt Test: Taylor sodium chloride drop test.

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