Haviland Durachlor Alkalinity Increaser

Brand: Durachlor
SKU: C002669-CS77C2
Inventory status: 19 in Stock


The Durachlor Alkalinity Increaser is designed to raise the total alkalinity levels of swimming pool water. This chemical is meant to be maintained between 80-120 ppm, so that the water does not turn corrosive or create a scale build-up.

  • Raises total alkalinity
  • Reduces and prevents corrosion
  • Help prevent pH fluctuations


NEVER mix different products together in the same bottle or pail. Add this product directly to the pool water. Always apply product to water with the circulation system operating. Brush unsettled materials from surface. Pool use may resume 15 minutes after the product has fully dissolved into the pool.

  1. Add 1.4 pounds for every 10,000 gallons of water to increase total alkalinity 10 ppm.
  2. Wait two hours and retest total alkalinity.
Alkalinity Level Increase Gallons of Water (1 lb = 1.75 Cups)
5,000 10,000 25,000 50,000
10 ppm 0.7 lbs 1.4 lbs 3.5 lbs 7 lbs
25 ppm 1.75 lbs 3.5 lbs 8.75 lbs 17.5 lbs
50 ppm 3.5 lbs 7 lbs 17.5 lbs 35 lbs


Sodium Hydrogen Carbonate: 100%