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Thread: Algae but not cloudy - something different

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    Algae but not cloudy - something different

    So, I've been reading this site for a while and it seems that a lot of posters are battling cloudy or greenish water without much comment on algae on the walls. In our case, our water is nearly perfect - I can see the screw heads at 8 feet down and it looks crystal clear but we have had to slam to clear some green algae buildup at the corners and at the base of the walls. This is starting again. Does this suggest a different problem? Maybe poor circulation? We have a clear solar cover that we leave on for 3-4 days straight most weeks. Pool has one skimmer and three returns plus two in the stairs.

    Stenner keeps FC between 6 and 7 with cya of 50 without fail. PH is 7.5 and stable. Cc is never above 0.5. This year, the temp has been steadily around 83f with some help from the heater. We do have lots of trees dropping junk on the pool but my understanding has always been that if the fc was correct, this shouldn't be an issue. I run the robot at least once per week.
    16' wide ~20,000gal IG vinyl lazy L shape pool circa 2002, 1hp Hayward Super Pump, Hayward S244T sand filter, Hayward H250ED2 gas heater, Hayward eVac Pro robot, Stenner pump for chlorine, TF-100 test kit
    2008 Gulf Coast 864 LEi hot tub

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    Smykowski's Avatar
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    Re: Algae but not cloudy - something different

    I'll ask the same question as the other thread....does it puff away very easily, or do you have to brush to get it loose?
    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: Algae but not cloudy - something different

    Puffs away pretty easily like when you step on it but I usually brush when I see it.
    16' wide ~20,000gal IG vinyl lazy L shape pool circa 2002, 1hp Hayward Super Pump, Hayward S244T sand filter, Hayward H250ED2 gas heater, Hayward eVac Pro robot, Stenner pump for chlorine, TF-100 test kit
    2008 Gulf Coast 864 LEi hot tub

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    Re: Algae but not cloudy - something different

    That being said, it is distinctly green and increases over time. Must be growing.
    16' wide ~20,000gal IG vinyl lazy L shape pool circa 2002, 1hp Hayward Super Pump, Hayward S244T sand filter, Hayward H250ED2 gas heater, Hayward eVac Pro robot, Stenner pump for chlorine, TF-100 test kit
    2008 Gulf Coast 864 LEi hot tub

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    Re: Algae but not cloudy - something different

    Do you have a main drain? If you do not have one or if is not in use than you do not have a propper circulation since the warm water will stay closer to the surface and the cold water will remain closer to the bottom of the pool. One must be sure that water in the pool is well mixed up in order to have a propper sanitation. I see that you have a robot, put it to work. It will mix the cold and warm water and in this way you will have the same level of chlorine everywere. Redirecting the return jets might work as well.
    South of France inground rectangular 17k pool - ruber membrane. Sliding dome, black thermal blanket covering 75% of the pool surface. Aqualux 3/4Hp pump, glass media sand filter, Zodillac robot, 110W UV-c lamp, Hayward brominator, Caliente 12kW heat pump.

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    PAGirl's Avatar
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    Re: Algae but not cloudy - something different

    How long does the pump run?
    26' X 52" Intex Ultra Frame. Intex Sand Filter
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    You can lead a horse to (clear) water, but you can't force him to swim in it!

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    Casey's Avatar
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    Re: Algae but not cloudy - something different

    You eat; You brush your teeth. Feed your pool; Brush your pool.
    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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    Re: Algae but not cloudy - something different

    Quote Originally Posted by PAGirl View Post
    How long does the pump run?
    6 hours at night. 3 hours during the day.
    16' wide ~20,000gal IG vinyl lazy L shape pool circa 2002, 1hp Hayward Super Pump, Hayward S244T sand filter, Hayward H250ED2 gas heater, Hayward eVac Pro robot, Stenner pump for chlorine, TF-100 test kit
    2008 Gulf Coast 864 LEi hot tub

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    Mod Squad kimkats's Avatar
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    Re: Algae but not cloudy - something different

    You have to help your pool out by brushing it.

    Put a ping pong ball in your pool. Watch it with the pump on. Where does it go? I bet you will find it does not really go to the corners so....................there will be a problem with algae in the corners and such.

    When my husband gets lazy on the brushing of the side of the pool we have the same problem. He finds that a good brushing at least 3 times a week does the job.

    Kim
    TFP Moderator 33x52 round AG 25,600 gals Sand Filter 1.5hp Pump - 2 Speed, SLAM, Pool School, Recommended Levels, Recommended Chemicals, Pool Math, Chlorine/CYA Chart, TF-100 Test Kit

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    Algae but not cloudy - something different

    Check any ladders and light niches. Pull the lights and clean anything that comes in contact with the pool (including smelly children and pool toys).

    Check that solar cover. I like the idea of a solar cover but, in practice, they are a pain in my opinion. And believe me, I live in the SW where a solar cover has significant impact on water evaporation. They are too messy and annoying for me to use and they are great algae nests.

    Check your filter as well. If you have a sand filter, deep clean it. And, as others have stated, brush you pool weekly.

    One other point to make - you say the algae is at the seam? How old is your liner? I'm no expert at vinyl liners but I do believe certain kinds of algae can infiltrate the vinyl especially at the seem and algae can grow behind the liner. Then, you kill the stuff at the surface but the colony deeper in remains.

    You may need to use mustard algae shock levels and then keep your FC above target. Also, borates might help as well and, a topic that is highly verboten here, the dreaded and all-consuming evil phosphates Some folks have noted that, after using phosphate removers, their pools are much less sensitive to certain types of algae. Finally, as insurance, you could use a regular dose of Polyquat-60 to help.

    Good Luck!!



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