The EcoPlus Chillers are suitable for use in reservoirs, hydroponic systems and fresh or saltwater aquariums. Each chiller provides a high-performance titanium heat exchanger for optimum performance and corrosion resistance. High-quality compressor is extremely efficient and reliable. The micro computer with digital LCD display allows for easy operation. Fittings are 1/2 in. 120 V / 60 Hz / 264 W / 2.2 Amps. Pump Size: Minimum 66 GPH/Maximum 317 GPH.