As a supplier of many fish we often use this product (as well as others) personally on our own farm and we love it!
This is a Coralife Digital Thermometer it is ideal for aquariums and terrariums. Readings from this device will show in 0.1 degrees Fahrenheit or Celsius. With a huge temperature range between 10 degrees F to 140 degrees F (-23 degrees C to 60 degrees C). Mounting suction cups, battery and 39 inch long temp probe cord are included.