Adjusting the level of chlorine

It is recommended that dry chemicals first be mixed into a generous amount of pool water in increments of about two pounds (1 kg), 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.

Best results are obtained by predissolving granular chlorine products, especially if you have a vinyl pool. Trichlor is erosion fed through skimmers or floating passive feeders. Simply add one Trichlor stick or puck. Do not try to break pucks, since these can burn skin.

 

Raising Chlorine 1 ppm

U.S. Customary Units:

  100 Gallons 1,000 Gallons 5,000 Gallons 10,000 Gallons 20,000 Gallons 50,000 Gallons
Tsp Oz Oz Oz Oz Oz
Sodhypo* 1 1 oz 7 oz 13 oz 1.5 pt 2 qt
Lithium 1/4 0.4 2 4 8 19
Calhypo 1/10 0.2 1 2 4 10
Dichlor† 1/10 0.2 1 2 5 12
Dichlor‡ 1/10 0.2 1 2 4 11
Trichlor — 0.1 1 1.5 3 7

Metric Units:

  400 Liters 4000 Liters 20000 Liters 40000 Liters 80000 Liters 200000 Liters
grams grams grams grams grams grams
Gas 0.4 5 20 40 80 200
Lithium 1 10 55 115 230 570
Calhypo 1 5 30 60 125 310
Dichlor† 1 5 35 70 145 355
Dichlor‡ 1 5 30 65 130 325
Trichlor 0.4 5 20 45 90 220
Sodhypo* 3 35 165 335 665 1665

*This is a liquid and the calculation assumes 1 liq. oz. (10%) = 1 dry oz.
† dihydrate form (56%)
‡ anhydrous form (see product label) (62%)