The HelloReef Stick-On Thermometer offers a simple and effective way to monitor your aquarium’s temperature. Featuring an easy-to-use stick-on design, it provides clear temperature readings in both Fahrenheit and Celsius using a liquid crystal color indicator. This low-profile thermometer is suitable for freshwater and saltwater aquariums, ensuring accurate monitoring without the need for probes or batteries. Just stick it to the outside of your tank for quick, hassle-free readings, helping maintain optimal water conditions for your aquatic life.