Fluval M100 Submersible Heater is a 100-watt aquarium heater featuring an ultra-slim profile and a mirror-like finish that helps it blend into the aquarium environment. It has an adjustable thermostat for precise temperature control and is made with high-quality components for reliability. The Fluval M Series provides even, stable heating and the reflective glass design allows it to naturally camouflage, ensuring efficient temperature regulation without distracting from your tank’s aesthetics.