Aqua One Electronic Thermometer ,The ST3 Electronic Thermometer is highly accurate due to the small probe being inside the aquarium.The LCD screen is very easy to read and is compact so as not to take up too much room on the outside of your aquarium.It is very reliable and runs on batteries which are includedWith the flick of a switch you are able to choose the thermometer to give you either a Celsius or Fahrenheit reading.
