This high-tech nano chiller will keep your water temperature stable despite daily fluctuations in ambient room temperature. At chill solutions we have specifically designed the csxc-1 to be used in a wide variety of cooling applications. The built-in thermostat can be set anywhere from 45F to 90F. Power he a DS, pumps, UV sterilizers and high-intensity lighting all add undesirable heat into the aquarium or hydroponic reservoir. The csxc-1 chiller is perfect for nano tanks, hydroponics setups, and aquariums up to 30 gallons (or more, depending on heat input). the same thermoelectric technology used in this device is used by nasa to generate electricity and maintain equipment temperature in space average temperature reduction: 10 gallons, more than 10F pulldown /// 20 gallons, 5-8f pulldown /// 30 gallons, 2-4f pulldown.