There are several causes of water overheating in a saltwater aquarium. UV sterilizers, ultra strong lighting systems, unique high heat light bulbs such as metal halide, even water pumps can cause the water in the tank to rise above acceptable norms. In these situations, a water chiller or cooler is needed to keep the fish population safe.
Saltwater Tank Coolers
Water chillers are carefully engineered to prevent direct contact with metals that may corrode and become an additional problem. These chillers work in one of two ways. They either allow water to pass through their chilling coils are they immerse in the water to allow for chilling. Either way, it is important to understand that like a room air conditioner they throw off heat so you must be careful to place the air exchange portion of the chiller away from the tank. What good would a chiller be if it chilled the water just to heat it up at the other end of the unit. Like heaters, it is important to place the coils or intakes strategically so the maximum amount of conductivity is established evenly throughout the aquariums.
It is easy to get intimidated by all of the equipment that a good tank should utilize. However, understand that this equipment when properly selected and set up removes 95% of the issues facing aquarium owners resulting in a carefree environment that’s both good for the owner and good for the tank inhabitants.