Water temperature is an important factor that affects the health of fish. The
Marina Lcd vertical mount digital thermometer (1.75" 4.45 c min length) is
accurate and easy to read, it ranges from 22 to 30 degrees C (72 to 86 degrees
F). It comes with an adhesive backing which makes it easy to mount to the
outside glass. Ideal for all fresh and saltwater aquarium setups.