BlueLine Biotherm Temperature Controller
.style1 { font-size: 16px; font-weight: bold;}Fluctuations in temperature cause changes to the water's specific gravity,   ability to hold oxygen and causes stress to fish, often leading to disease. A   consistent temperature is a key element of stability, and stability is a   cornerstone of the successful marine aquarium. The BlueLine Biotherm Controller   provides a remote sensing thermometer and digitally precise temperature control   for the Biotherm Heater or your existing heater. Know in a single glance the   thermostat setting and the aquarium temperature with two bright independent LED   displays on each Biotherm Controller. This becomes quite useful in monitoring   the swings in temperature above your set point, during the course of the day or   from season to season. Operation is simple and straight-forward and you will   enjoy the integrated safety features that include overheat and dry running   protection cutouts. When you consider the investment you have made to stock your   tank, a high-quality heater controller like the Biotherm Controller becomes an   essential insurance policy.The Biotherm Controller handles up to 1000wDownload Biotherm Controller Manual(PDF 56KB)