Explore our wide range of aquarium heaters and chillers to keep your fish tank at the perfect temperature year-round. Fish tank temperature has a direct effect on your fish's metabolism. If your fish tank heater is set to a lower temperature, this can slow down a fish's metabolism, making them sleepy and sluggish. Alternatively, warmer water can boost their metabolism speed. A high-quality aquarium heater will keep your fish feeling healthy and happy. We stock high-quality fish tank heater brands like Aqua One, Blue Planet, Eheim and more. Shop our range of live fish today.