Marina "Minerva", 66 to 86-Degree Fahrenheit / 19 to 30-Degree Celsius
The Marina Minerva Thermometer  is accurate and easy to read, and ranges from 66 to 86-degree Fahrenheit. It comes with an adhesive backing which makes it easy to mount to the outside glass and is ideal for all fresh and saltwater aquarium setups. The Marina Minerva Thermometer is the perfect way to make sure the water temperature in your aquarium is just right for all your fish friends.