CoZroom LCD Digital Aquarium Thermometer for Fish Tank Water Vivarium Temperature Sensor, Pack of 3, Black Reliable and good-working thermometer for your fish tank or terrarium. Sustains a temperature range of -50 - 70 and operates within -10 - 50. The glass aquarium thermometer is designed with a LCD display for easy reading. Works with a high accuracy of 1 degree to set the water at the exact temperature for the fishes and animals. Powered by two button batteries.