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Card 1, Side 1 This kit is designed to be an accurate, easy-to-use testing system for the chemical maintenance of pools and spas. It contains all that is necessary for Primary Testing: pH, chlorine and bromine, acid demand and total alkalinity. Carefully read all instructions before testing and treating water. Improper chemical maintenance can lead to problems such as algae growth, staining, etching, discoloration and excessive chemical consumption. Testing tips

• When not in use, the kit should be stored away from heat and direct sunlight with the case closed to prevent premature degradation of the reagents.
• Always thoroughly rinse both the test cells and caps before adding reagents, and after each use.
• Use caps while testing to prevent possible contamination.
• To draw a proper sample, hold the test block with the openings facing downward. Immerse it 18 inches below the water surface. Invert and fill cells, then drain excess sample to proper fill line.
• To insure uniform drop-size, hold the bottle vertically while adding reagents.
• Testing should be done in a well-lighted area.

WARNING: Never mix pool chemicals prior to addition to pools and spas. Always allow plenty of time for water circulation between the addition of different products. Chlorine and Bromine Testing Card 1, Side 2​ This test kit is suitable for the testing of the disinfectants used to treat pools and spas. The color standards in the test block measure the disinfectant strength in the water; actual values of bromine and iodine may be taken from the accompanying chart. O.T.O. procedures: Chlorine and bromine testing

1. Fill small cell to the upper line with water sample.
2. Add 5 drops of O.T.O. Chlorine Indicator No. 1, cap and quickly invert several times.
3. Compare with color standards for free chlorine at 10 seconds.
4. At two minutes, compare with color standards for total chlorine or bromine.

If the total chlorine exceeds free chlorine, subtract to determine the chloramines; if greater than 1, shock the water. Acid and pH demand Card 2, Side 1 pH test procedure

1. Fill the large cell to the upper line with water sample.
2. Add 1 drop of Chlorine Neutralizer No.4 for each chlorine or bromine ppm, cap and invert several times. ​ Note: this product also removes bromine.
3. Add 5 drops of Phenol Red No. 2, cap and invert several times.
4. Allow at least two minutes, and then match the sample color to the pH color standards. If the pH is above 7.6, proceed to the acid demand test procedure. If it is below 7.2, add soda ash to adjust the water according to label instructions.

Acid demand test procedure

1. Using the same sample used for the pH test, add 1 drop of Acid Demand No.3, cap and invert several times

Repeat step 1, counting the drops, until sample color matches a color standard within the recommended pH range. Use the chart provided to determine the amount of acid needed to adjust the pH. Total alkalinity testing

1. Prior to this test, the pool and spa water must be within the recommended pH range (7.2 to 7.6); adjust the pH if necessary
2. After testing or adjusting for pH, fill large cell to the lower line (half full)
3. Add 1 drop of Chlorine Neutralizer No. 4 and swirl to mix
4. Add 2 drops of Total Alkalinity Indicator No. 5 and swirl to mix; the sample color should be blue
5. Add 1 drop of Total Alkalinity/Acid Demand No. 3 and swirl to mix
6. Repeat step 5, counting drops, until the sample color becomes yellow or clear
7. Multiply the number of drops times ten (x 10) for the total alkalinity

For low alkalinity, add sodium bicarbonate or Alkalinity Booster​ to raise total alkalinity to the recommended range as needed. For high alkalinity, replace all or part of water with fresh water. Please note that that some regions have tap water which has higher total alkalinity than the recommended range. The addition of acid will help, but is limited by the pH lower limit of 7.2. For those regions, the pool and spa water should be replaced when total alkalinity is twice that of the tap water.