eSHa Aqua-Quick-Test contains 50 Test strips = 300 single tests. Good water quality is essential for the plants and fish in your aquarium or pond: regular testing helps ensure fish live healthy, happy and long lives. With eSHa Aqua-Quick-Test you have a great water testing kit: it can monitor 6 values, which are crucial for good water quality: pH (acidity), KH (carbonate hardness), GH (general hardness), NO2 (nitrite), NO3 (nitrate) and Cl2 (chlorine). eSHa Aqua-Quick-Test is easy to use, saves you hassle and time, and is accurate!