Photo of Severest Algae Treatment, a pool chemical used to kill all types of algae in swimming pools

Severest Algae Treatment

Lingering algae problems? Cover fall in during the off-season? Our product will take care of the worst algae issues.

Product Details


  • NEW Unique copper blend
  • Triple chelated to prevent staining on surfaces
  • Works in chlorine or bromine sanitized pools
  • Performance increases as the temperature increases and the more the sun shines directly on the water
  • Swim immediately after application (if chlorine is at or below 4 ppm)


  • Kills all algae – any color – any type
  • Continuously destroys algae for days after application


  • Adjust pH 7.2 – 7.6. Alkalinity 80-120 ppm
  • Superchlorinating the pool water before adding this product may be necessary if algae is stubborn or resistant
  • For treatment of visible algae, Add 4 ounces per 10,000 gallons of pool water; 10 ounces may be used for stubborn or resistant algae
  • Brush pool. Run pump and filter continuously until water conditions improve

Available Sizes

1 qt bottle

Product Downloads

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