Temperature control within an aquarium is an important parameter in helping to reduce stress on fish and corals where high temperatures or excessive temperature variations can result in coral bleaching or death. D-D have been supplying chillers for several years that provide high efficiency, proven reliability and economy with respect to both running and initial purchase costs. The new DC300 refrigerated chiller is compact enough to fit in most cabinets but has a cooling capacity of 300W making it ideal for aquariums of 150 lts at a 10°C temperature drop to 300 lts with a 5°C temperature drop.