Licking County. Health Department. Pool and Spa Water Chemistry Adjustment Guide
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1 Pool and Spa Water Chemistry Adjustment Guide The following guide can be used to assist in the adjustment of the water chemistry in your swimming pool or spa. Follow the steps below: 1. Determine the chemical adjustment that is desired. Use Pool/Spa Chemistry Guideline page (Page 2) to determine the minimum, ideal, and maximum requirements for your pool or spa. Tip: if multiple chemical adjustments are required, adjust in the following order: 1) Total Alkalinity 2) Chlorine 3) ph 4) Other Adjustments. 2. Next, determine which chemical will be used to make the desired adjustment. Refer to the Water Chemistry Adjustment Guide (Page 3) to determine which chemicals you will need to use to make the adjustment. 3. Refer to the Water Chemistry Adjustment Worksheet Guidance (Page 4) for an example of chemical adjustment. 4. Page 5 has blank water chemistry adjustment worksheets available for your use. If you have questions regarding water chemistry guidelines and water chemistry adjustment, call the Licking County at (740)
2 Public Swimming Pool: Parameter Minimum Ideal Maximum Free Chlorine (ppm) N/A (recommended not higher than 5) Combined Chlorine (ppm) Total Bromine (ppm) N/A (recommended not higher than 10) ph Total Alkalinity (ppm) Should not impair ability to meet other required chemical/clarity parameters Total Dissolved Solids (ppm) Shall not maintain any level that impairs ability to meet required chemical/clarity parameters Cyanuric Acid (ppm) Temperature N/A Personal Preference 90 F ORP 650 Calibrate to disinfectant level Clarity Deepest point of pool visible from deck Public Spa: Parameter Minimum Ideal Maximum Free Chlorine (ppm) N/A (recommended not higher than 10) Combined Chlorine (ppm) Total Bromine (ppm) N/A (recommended not higher than 10) ph Total Alkalinity (ppm) Should not impair ability to meet other required chemical/clarity parameters Total Dissolved Solids (ppm) Shall not maintain any level that impairs ability to meet required chemical/clarity parameters Cyanuric Acid (ppm) Temperature N/A Personal Preference 104 F ORP 650 Calibrate to disinfectant level Clarity Deepest point of spa visible from deck Page 2
3 Water Chemistry Adjustment Guide: Chemical Increase Chlorine Calcium Hypochlorite (67%) Sodium Hypochlorite (12%) Lithium Hypochlorite Dichlor (62%) Dichlor (56%) Trichlor Neutralize Chlorine Sodium Thiosulfate Sodium Sulfite Increase Total Alkalinity Change Per 10,000 Gallons Water 1 ppm 2 oz oz. 3.8 oz. 2.1 oz. 2.4 oz. 1.5 oz. 1 ppm 2.6 oz. 2.4 oz. Sodium Bicarbonate Sodium Carbonate Sodium Sesquicarbonate Decrease Total Alkalinity Muratic Acid (31.4%) Sodium Bisulfate Increase Stabilizer Cyanuric Acid 1.4 lbs. 14 oz lbs. 26 fl. oz. 2.1 lbs. 13 oz. Increase ph 0.2 Sodium Carbonate (Soda Ash) Sodium Hydroxide 50 % (Caustic Soda) 6 oz. 5.5 fl. oz. Decrease ph 0.2 Muriatic Acid 12 oz Note: Always follow instructions on the manufactures label for exact dosage amounts and handling. Page 3
4 Water Chemistry Adjustment Worksheet Guidance: The following guide can be used to assist in the adjustment of the water chemistry in your swimming pool or spa. The Water Chemistry Adjustment Guide (Page 3) is needed. Follow each step to determine the proper amount of chemical needed to make the desired adjustment. 1. Write the chemical adjustment being made. 2. Write the chemical being used to make the proper adjustment from Adjustment Guide (Page 3) 3. Write the actual volume of your pool or spa. This can be found on your pool license. 4. Write the desired change in water chemistry. For example, free chlorine is 1 ppm. I want to increase free chlorine to the ideal range from the Chemistry Guidelines (Page A1). Current reading 1 ppm, increase to 3 ppm, desired change is 3 ppm 1 ppm = 2 ppm. 5. From the Adjustment Guide (Page A3) write the change per 10,000 gallons of water. 6. From the Adjustment Guide (Page A3) write the amount of chemical with units that is required per 10,000 gallons of water. 7. Divide the pool volume and desired change columns. 8. Multiple the bottom row. 9. Transfer the units from the chemical amount to the total box. 10. Add the calculated amount of the chemical in the total box to your pool or spa to make the desired adjustment. Step 1) Increase Free Chlorine Step 2) Calcium Hypochlorite (67%) Step 6) 2 oz. Step 3) 20,000 Gallons i x Step 7) 2 Step 4) 2 ppm Step 5) 1 ppm i x Step 7) 2 u = Step 8) & Step 9) 8 oz. Page 4
5 Water Chemistry Adjustment Worksheet: Gallons i i i x x = Gallons i i i x x = Page 5
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reacts with ammonium sulfate to form ammonia It reacts with a carbonate to form carbon dioxide. It reacts with an ammonium salt to form ammonia.
1 Which statements are properties of an acid? 1 reacts with ammonium sulfate to form ammonia 2 turns red litmus blue 1 2 2 Which property is not characteristic of a base? It reacts with a carbonate to
Chloramine (Mono) and Nitrogen, Free Ammonia
Chloramine (Mono) and Nitrogen, Free Ammonia DOC316.53.01016 Indophenol Method 1 Method 10200 0.04 to 4.50 mg/l Cl 2 0.01 to 0.50 mg/l NH 3 N Powder Pillows Scope and application: For the determination