Haviland Durachlor Super 90

Brand: Durachlor
SKU: C002352-CS20B2
Inventory status: 3 in Stock


The Durachlor Super 90 product is a granular form of a stabilized chlorine concentrate that is specifically designed for white plaster pools. Not only is Super 90 used as a highly concentrated sanitizer, but this product can also treat black algae.

  • Stabilized chlorine concentrate specifically designed for white plaster pools
  • Can also treat black algae
  • Provides 90% available chlorine


For Algae:

  1. Turn off pump before application.
  2. Brush algae spots with a steel brush before adding this product.
  3. Sprinkle this product directly over the pool walls and floor on which algae appears. Use approximately 1 pound per 10,000 gallons of pool water. For severe cases the dosage may be doubled.
  4. Filter pump can be turned on after this product has been in the pool for at least 8 hours.
  5. Brush pool again with stainless steel brush.
  6. Do not use pool until chlorine residual falls below 3.0 ppm.


  1. Check residual chlorine with a reliable test kit. If below 1.0 ppm broadcast over the deepest end of the pool 4 oz of this product for every 12,000 gallons of water. Repeat application until a 1.0-1.5 ppm residual chlorine is obtained.
  2. In extremely hot weather or extreme bathing loads, a shock dosage of chlorine may be obtained by broadcasting this product directly into the pool water. 1 oz of this product for each 6,000 gallons of pool water will provide 1.1 ppm of chlorine.
  3. Be sure to measure pH immediately after application and at least once each week with a reliable pool test kit. Adjust pH to 7.2-7.8 if necessary by adding a suitable agent such as sodium bisulfate to decrease pH, or soda ash to increase pH. Follow instructions for use on labels of these products.


Trichloro-s-triazinetrione: 99%

Other Ingredients: 1%