Since water temperature is an essential factor in the well-being of fish, it is important to have a good thermometer. As for the Marina floor thermometer, designed to sink to the bottom of an aquarium and remain there in an upright position, it is precise, easy to read and indicates the temperature in degrees Celsius and Fahrenheit.
It also has a temperature scale indicator that is safe for most tropical fish.
For freshwater or saltwater aquariums.
