Function: Good water quality is essential for the fish and fish in your aquarium. Regular testing of water quality values helps to ensure that the fish live a healthy happy and long life. With the Aqua Quick Test you can monitor 7 values that are essential for good water quality: pH (acidity ) KH (carbonate hardness) GH (general hardness) NO2 (nitrite) NO3 (nitrate) Bromine (bromine) and chlorine. These values determine how healthy your aquarium is. Abnormal values can cause problems such as diseases algae blooms abnormal growth and reproduction. Water quality is the result of many factors such as: s fish aquarium volume etc. as well as external factors such as overfeeding of water added to the filter used and duration and amount of lighting etc. Specification: Regular using the Aqua Quick Test allows you to detect water quality problems in time to take corrective action. Just dip the test strip into your aquarium or pond and compare the colors on the strip to the color chart on the tank. Saves hassle. Saves time. Easy to use. Accuracy .The package contains: 1 pack of 50