What is pH? Technically it is the measurement of the hydrogen ion concentration of a given sample of water. From this measurement it can be determined whether the water is acid, neutral or alkaline. The scale extends from 0 to 14. A pH between 0 and 7 is termed acid, and a pH between 7 and 14 is termed alkaline. The indicator in this kit has a pH range from 6.0 to 7.8 and is therefore suitable for most freshwater aquaria. At or below pH 6.0 the test sample would turn yellow. At or above pH 7.8 the test sample would turn blue. Why pH Changes pH is not a constant factor and is subject to continual change due to influences like bacterial assimilation of waste causing acidity or calcium and magnesium compounds like shells or coral that cause alkalinity. Thus, under normal aquarium conditions, because of fish waste and unused food, the water would drift to acidity. Directions for Use: Rinse a clean test tube and cap several times in water to be tested. Fill to line (12.5ml) with water to be tested. Add 3 drops of Indicator solution Place the test tube on the white background of the colour chart, view vertically (down inside the test tube) with the light behind you. The colour in the test tube is best viewed with natural light. View immediately. Adjust pH slowly.
