Bioscape Tropic heaters come with a 3 Year Replacement Warranty for piece of mind. They are a fully Automatic and adjustable aquarium heater. Water temperature remains consistent as heat is evenly distributed over the heater element. The Bioscape Heater Range is reliable and sturdy with a built in easy to Set Temperature Dial – Adjustable between 22 -34C. The range also features an On/Off indicator light. The Bioscape Tropic Heater range is fully submersible and Includes a Bonus Thermometer