Lights and pumps can quickly raise water temperature of aquarium and aquaculture to dangerous levels, but water chiller will help to lower and maintain a safe temperature. Laswim chiller utilizes high efficiency internal threaded tube, its high heat exchange efficiency is more than twice that of traditional shell and tube heat exchangers. The inlet and outlet of the refrigerant is excellent sealed to avoid leakage. The sealing is made of high temperature resistant materials, which can withstand a wide temperature range of -20℃ to 200℃. Filling with heat insulation material between the steel housing and the engineering plastic housing, which can effectively reduce the heat loss of the heat exchanger. Durable independent joint, water inlet and outlet is made of metal materials, sturdy and durable, can can be used under special water quality and effectively resist the corrosion of acid, alkali, chloride ion and erosion of sediment.