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2221 Standard Ave.
Santa Ana, CA 92707
Toll free: 800-676-SWIM
Office: 714-754-4044
Fax: 714-754-1405
1-800-676-SWIM
info@knorrsystems.com
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Helpful Hints - Troubleshooting
Chemical Dosing Charts
DOSAGE REQUIRED TO CHEMICALLY TREAT 10,000 GALLONS OF WATER
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Parameter - Chemical
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Required Dosage
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| Free Chlorine |
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1 ppm |
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10 ppm |
| Calcium Hypochlorite |
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2 oz |
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20 oz |
| Sodium Hypochlorite |
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13 oz |
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64 oz |
| Chlorine Gas |
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1.3 oz |
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13 oz |
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| Neutralize Chlorine |
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10 ppm |
| Sodium Thiosulfate |
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10 oz |
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| Increase Total Alkalinity |
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10 ppm |
| Sodium Bicarbonate |
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24 oz |
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| Increase Calcium Hardness |
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10 ppm |
| Calcium Chloride 77% |
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20 oz |
| Calcium Chloride 100% |
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16 oz |
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| Increase Stabilizer |
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10 ppm |
| Cyanuric Acid |
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6 1/2 oz |
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1 lb. = 16 ounces
1 gallon = 128 ounces
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FORMULA
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| Chemical to Add |
= |
Amount of Chemical |
x |
Amount of Desired Change |
x |
Pool Gallons |
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[given on table] |
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10 ppm |
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10,000 gallons |
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Example:
Raise alkalinity from 50 ppm to 300 ppm of alkalinity on 150,000 gallon pool (in pounds).
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| Chemical Added |
= |
24 oz |
x |
(300 ppm - 50 ppm) |
x |
150,000 gallons |
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10 ppm |
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10,000 gallons |
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| Chemical Added |
= |
24 oz |
x |
250 ppm |
x |
150,000 gallons |
= |
9000 oz |
x |
1 lbs |
= |
562.5 lbs |
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10 ppm |
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10,000 gallons |
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16 oz |
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TO INCREASE pH
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Amount of Soda Ash needed to raise pH to 7.4
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| Actual pH |
10,000 gallons |
25,000 gallons |
50,000 gallons |
| 6.6 |
1 1/2 lbs |
3 3/4 lbs |
7 1/2 lbs |
| 6.8 |
1 1/4 lbs |
3 lbs |
6 lbs |
| 7.0 |
1 lbs |
2 1/4 lbs |
4 3/4 lbs |
| 7.2 |
3/4 lb |
2 lbs |
3 1/4 lbs |
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To Add: Fill a clean bucket with water. Carefully add soda ash. For best results, dilute soda ash as much as possible with water. Stir until dissolved with a clean rod. Pour solution down sides of pool. Close the pool for at least 15 minutes before allowing swimmers to re-enter.
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Warning: Do not add more than 1 pound of soda ash per 10,000 gallons of water at a time as it may cause the pool to cloud ("milky" consistency). Also, if your alkalinity is over 120 ppm, the addition of soda ash may also cause your water to cloud.
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TO LOWER pH
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Amount of Muriatic Acid needed to lower pH to 7.6
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| Actual pH |
10,000 gallons |
25,000 gallons |
50,000 gallons |
| 8.4 |
1/4 gallon |
3/4 gallon |
1 1/2 gallon |
| 8.2 |
3 1/2 cups |
1/2 gallon |
1 gallon |
| 8.0 |
2 1/2 cups |
1 1/2 quarts |
3 quarts |
| 7.8 |
1 1/3 cups |
3 1/4 cups |
1 1/2 quarts |
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To Add: Wear protective clothing including acid-resistant apron, chemical resistant gloves, approved breathing apparatus and eye protection. Fill a clean bucket with water. Add Muriatic Acid to water. Carefully pour down side of pool distributing solution over as large an area as possible. Close the pool for at least 30 minutes before allowing swimmers to re-enter.
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Warning: Never mix acid with any other chemicals. If splashed in eye, immediately irrigate with water for at least 15 minutes with large amounts of water - Call 911. If splashed on skin, wash with large amounts of water for at least 30 seconds.
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1 quart = 32 ounces
1 cup = 8 ounces
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