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    In the Swim Black Algaecide

      In the Swim Black Algaecide is rated 4.6 out of 5 by 10.
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    Free 1-Day Delivery Available!

    To: Ashburn

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    In the Swim Black Algaecide Does the Job When All Others Fail

    Black algae is known to be hard to remove from a pool which is why many pool owners turn to In the Swim’s black algaecide. Its special formula helps kill and prevent black algae, along with all other algae, from blooming in your pool with regular use.

    • Black algae killer from In the Swim uses copper as an active, dependable ingredient
    • Black algaecide also tends to soften water
    • Highly effective, works when other treatments don’t
    • Particularly stubborn black algae blooms may require multiple treatments
    • Formula is non-clouding and non-foaming
    • Initial dosage: 16 oz. per 10,000 gallons at the onset of black spots
      • Item: # Y1400 1 qt. $19.99
      • Item: # Y1410 4 X 1 qt. $77.99
      • Customer Review
      • FAQS
      • MORE INFO
      Rated 4 out of 5 by from Keep fighting it Black algae is a scourge of old pools. It gets in the gunnite and there is basically nothing you can do. You just have to keep pouring in the chemicals and watching your pool laugh at you. I am here to tell you no black algeacide works to eradicate. They all work to help control. Some are a little better than others. This one is fine. I have not seen a big difference in the super expensive black algaecides that are sold. It's all about how much active product is in the bottle. If you have black algae in your pool, my sympathies, just learn to live with it and be so happy on those days when your water looks clear and sparkling and you beging to kid yourself that it's over. It's not. Keep a bottle of algaecide close at hand at all times. Good luck!
      Date published: 2012-07-01
      Rated 4 out of 5 by from most copper content still have black algae problems and have done everything recommended. Product seemed to slow things a bit but didn't kill it off.I steel brushed it then scrubbed with a chlorine tab then shocked and then added 15 oz of this product at night, only to have the algae resurface 4 days later.
      Date published: 2009-07-25
      Rated 5 out of 5 by from GREAT PURCHASE THIS IS THE BEST ALGAECIDE! WHEN OTHER ALGAECIDE PRODUCTS FAIL YOU CAN COUNT ON THIS ONE TO MAKE YOUR POOL CLEAR AGAIN.
      Date published: 2009-07-20
      Rated 4 out of 5 by from This algaecide worked well and took care of my black algae.
      Date published: 2009-07-13
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      What is the dosage?
      - At the onset of black spots, it is recommended to use 12 oz. per 10,000 gallons.
      How long do I have to wait to swim in my pool after using this product?
      - You can swim immediately after treatment.
      Is this a foaming algaecide?
      - No, this is non-foaming and will not cloud water.
      Will this prevent black algae from coming back?
      - No, this works to overcome black algae's resistance to other chemicals.
      Will this get rid of my algae?
      - No, this does not get rid of algae, this is a preventative. Shocking your pool water will get rid of algae. The algaecide is used to prevent the algae from coming back.
      More Information
      ACTIVE INGREDIENTS: copper sulphate pentahydrate
      Tends to soften water.
      Brush problem area ever day to remove dead algae.
      Multiple treatments may be necessary to control stubborn algae.
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