Aqua One Aquarium Heaters This is the toughest, best value heater we know of. Relatively easy to set and forget with good heating capacity and a great three year warranty package the AquaOne heaters come in a good range of sizes from a tiny 55w baby to a strapping 300w bruiser. We didn't think that the Australians knew much about heating aquariums - it seems we were wrong.
Aquarium Heater Spares and Accessories It's essential to set your heater via a good thermometer - you cannot rely on even the best heaters having an accurate scale. In addition a decent thermometer will act as a great early warning system should your heater start to act up at the end of it's life.
The Aqua Minder is another great accessory which will warn you about over, or under heating in your aquarium as well as reminding you about water changes and filter maintenance. The Aqua Minder is cheap insurance and well worth checking out.