1. Rinse the water sample test tube several times with the water to be tested and then fill with sample water to the 5 ml mark.
2. Add 5 drops of the reagent contained in the bottle and gently swirl to mix.
3. Match the colour of the sample with the colour chart by positioning the test tube next the most similar colour. For accurate readings compare the colours from above.
CAUTION: the ideal pH level for freshwater fish is between 6.8 and 7.0, if lower, it is necessary to increase the pH to a sage level for the fish. To do this utilize a specific product such as PRODAC's MUTAPHI D. Thoroughly clean the test tube after use, securely seal all reagent containers and store in a cool, dry place away from sunlight. Keep the product out of reach of children.