Whether you have an 8-gallon starter tank or a 55-gallon reef aquarium, tropical fresh and saltwater fish add a charming ambience to your home. As fish tank heaters, water conditioners and aquarium filters are necessary in your aquariums clean, these supplies are also necessary in maintaining the health of your aquatic life. Aquarium heaters are needed to heat the water to the right temperature for your aquatic life to thrive. As fish are unable to produce body heat, fish tank heaters are needed for pet fish to maintain healthy immune systems. An aquarist's goal is to replicate the natural aquatic habitat for pet fish and other aquatic life to keep them healthy and stress-free. In selecting from the assortment of mini aquarium heaters and various types of submersible heaters available, it's important to keep in mind that the size of your tank plays a key role as smaller aquariums may require smaller or mini aquarium heaters. Additionally, the species of your pet fish play a key role as many species that are indigenous to the warmer waters of the tropics typically prefer warmer temperatures. Promote the health and longevity of your aquatic life by selecting the aquarium heaters, water conditioners and filtration systems that are best for them.