Adjusting the level of cyanuric acid

It is recommended that dry chemicals first be mixed into a generous amount of water in increments of about two pounds, and the predissolved mixture be distributed evenly around the pool unless directed otherwise.

Precautions

  • Never add water to chemicals; always add chemicals to water.
  • Always follow manufacturer’s recommendations and warnings on product labeling.
  • Never mix two chemicals together since their pH might vary and could cause an explosion or fire.

Usually a 30 – 50 ppm concentration of cyanuric acid will produce good chlorine stabilization. However, your service professional may have a different recommendation. Usually cyanuric acid is added to a skimmer and travels to the filter where it may take 24-48 hours to completely dissolve. Determine how much cyanuric acid you wish to add and find this number on the left-hand side of the table. Match this with the pool or spa water volume listed at the top of the table. Keep in mind that dichlor and trichlor products will add cyanuric acid as well.

 

Raising Cyanuric Acid

U.S. Customary Units:

  100 Gallons 1,000 Gallons 5,000 Gallons 10,000 Gallons 20,000 Gallons 50,000 Gallons
To Raise ppm — Tsp. Lbs. Oz. Lbs. Oz. Lbs. Oz. Lbs. Oz. Lbs. Oz.
10 — 0.75 0 1 0 7 0 13 1 11 4 3
20 — 1.5 0 3 0 13 1 11 3 5 8 6
30 — 2.25 0 4 1 4 2 8 5 0 12 8
40 — 3 0 5 1 11 3 5 6 11 16 11
50 — 3.5 0 7 2 1 4 3 8 6 20 14

Metric Units:

  400 Liters 4000 Liters 20000 Liters 40000 Liters 80000 Liters 200000 Liters
To Raise ppm Kg g Kg g Kg g Kg g Kg g Kg g
10 0 4 0 40 0 200 0 400 0 800 2 0
20 0 8 0 80 0 400 0 800 1 600 4 0
30 0 12 0 120 0 600 1 200 2 400 6 0
40 0 16 0 160 0 800 1 600 3 200 8 0
50 0 20 0 200 1 0 2 0 4 0 10 0

 

Notes:

Cyanuric Acid may require 24 – 48 hours to completely dissolve.