Dear Users: Thank you for choosing AQUANATURE ARCTIC CHILLER. The new generation of AQUANATURE’S ARCTIC CHILLERS suitable for freshwater & salt water Aquaria. The AQUANATURE ARCTIC CHILLERS newly design keeping everything in mind of hobbyist needs, include an increase in cooling efficiency and improved usability, functionality, and durability. AQUANATURE ARCTIC CHILLER is energy-efficient and environmentally friendly chiller. The new AQUANATURE ARCTIC CHILLER ONLY models 160,300,500 & 1000 Available with low energy consumption with Titanium coil chillers can easily outperform compressors by cutting energy consumption by 30% to 50%. EFFICIENT COOLING TECHNOLOGY High-end compressors and titanium coaxial heat exchangers provide high performance, low energy consumption, and low noise levels. DIGITAL THERMOSTAT Accurate temperature detection temperature control system.