Haviland Durachlor Granular

Brand: Durachlor
SKU: C003610-CS20B2
Inventory status: 8 in Stock


The Durachlor Granular product is a potent form of stabilized chlorine. It is a granular chlorine that is a fast dissolving sanitizer. This product will effectively control bacteria and algae while helping to maintain sparkling clear water. It is also compatible with salt water pools.

  • Fast dissolving granular chlorine sanitizer
  • Control bacteria and algae while clarifying the water
  • Compatible in salt water pools


When using product in conjunction with this product, follow the instructions on those products. NEVER mix different product together in the same bottle or pail. Clean filter or backwash according to the manufacturers instructions. Test pH and adjust to 7.2 - 7.6. If chlorine is used as primary sanitizer, increase the cyanuric acid levels to 30-50 ppm. Continuously run the circulation pump prior to adding this product. Treatment must be done at night and during a period when the pool is not in use.Do not enter the pool unless the free residual chlorine has dropped below 3 ppm.

Initial and Routine Applications:

Initially treat pools, with the circulation pump on, by adding 3 to 4 ounces for every 10,000 gallons of pool water. Repeat additions until chlorine levels reach 1-3 ppm. Add this amount directly to the deepest end of the swimming pool. Use a pool brush on surfaces if this product settles to the bottom of pool surfaces. Never allow un-dissolved product to rest in contact with pool surfaces. Regular additions of 1-2 ounces of this product will be necessary to maintain 1-3 ppm of free available chlorine at all times. This is regardless if pool is dormant or receives consistent use. Actual dosages of this product required to maintain the desired free chlorine residual will vary with sunlight, water temperature, bating load, and other factors. Use a test kit often.


Add 1 pound of this product per 10,0000 gallons of pool water. Maintain operation of your pump and filter. Superchlorinate at least once a week during periods of heavy use or when water temperatures exceed 80°F. Apply once every two weeks in residential pools receiving normal use.