Aquarium heaters are essential for maintaining high enough temperatures for your tropical fish, especially in winter months. At 123 Aquatics, we stock a range of aquarium heaters from manufacturers such as Rena, Eheim, TetraTec, Visitherm and Interpet.
All of our Rena fish tank heaters have built-in thermostats which automatically regulate the water temperature so you don't have to. However it is still advisable to use them with an aquarium thermometer to ensure the temperature the heater stat is set at is correct for your fish.