Among the many aquarium supplies available, aquarium thermometers are some of the most important in helping to maintain a healthy water temperature for your pet fish. As many species of tropical fish, such as Rainbowfish, Cichlids and various types of Brackfish thrive in warmer aquarium water, there are other species that prefer colder water. When setting up your aquarium, it's important that aquatics fish thermometers are utilized to ensure that the water temperature within the aquarium consistently stays within the range required by your salt or freshwater fish. Whether you have tropical fish or species of fish that prefer a colder water temperature, such as various types of Goldfish, Koi and Barbs, it's important that you monitor your aquarium thermometers regularly. This ensures their health and safety as a sudden rise or drop in water temperature may lead to stress, illness or other severe health conditions. As many marine hobbyists and aquarists know, the key to keeping your fish happy and healthy is to provide them with a stress-free environment that is well-maintained and relatively similar to their natural environments. By utilizing and regularly monitoring the aquatics fish thermometers within your aquarium, you can ensure the health and longevity of your pet fish.