The Marina Aquarium Floating Thermometer accurately monitors water temperatures to protect your fish from unsafe temperatures. An attached suction cup to secures it tightly to your aquarium wall. It features Fahrenheit and Celsius readings and is suitable for fresh and saltwater.
The green bar on the thermometer indicates a range of ideal, safe temperatures for most tropical fish. This makes it easy for you to make sure your water is adequately heated for optimal fish health and activity.