Fluval T150 Fully Electronic Aquarium Heater 150 watt

150-Watt heater designed for freshwater aquariums up to 45 Gal (150 L) with advanced electronic construction provides superior accuracy, stability and long-term performance,24/7 monitoring regulates temperature and avoids large, unsafe fluctuations and 360 indicator light ring displays heat mode clearly from any angle (illuminates RED when heating function is engaged and BLUE when desired temperature is achieved),In absence of water, the T-Heater automatically cuts power to prevent overheating and Heater Guard provides additional protection against breakage,Large grip dial easily adjusts water temperature from F / C,Fully submersible design allows for placement anywhere in aquarium either vertically or horizontally