Live Meter Master Test Kit in-tank meter takes test strip water monitoring technology into your aquarium, making it even easier to maintain healthy water quality. LiveMeter Master Test Kit helps you maintain healthy water by constantly monitoring pH, ammonia and temperature, providing an immediate indication when harmful changes occur. Glance at the active Live pH or Live NH3 membrane on your LiveMeter Test Kit to determine pH or ammonia levels. The LiveMeter thermometer provides a convenient display to check water temperature. Lasts up to 6 weeks. For freshwater use. Shipping weight: 1/4 lb.