Aquariums Online sell a broad range of aquarium heaters. We sell internal heaters by Hydor, Rena and Tetratec plus we also sell the Hagen elite internal aquarium heaters. Aquarium heaters can vary in cost depending on the size of the aqauarium you have, if your tank has a capacity between 20-50 litres then the Hydor Theo 25 Watt aquarium heater is a good choice, if you have a large tank then a Tetratec HT300 internal aquarium heater is perfect for a tak with a cubic capacity between 300-450 litres. |If you need any help choosing the right aquarium heaters then please feel free to contact us. | | |
