An aquarium chiller is the best option for maintaining temperature consistency, therefore lowering the stress in your tank. It really helps to prevent the growth and spread of disease and algae in your fish tank. Without an aquarium chiller, maintaining that optimal tank temperature in the summer months can be a real challenge. Aquarium chillers are are very low maintainence and an item that once purchased should give you years and years of service. They will be a great help in keeping your marine life happy, and healthy in those hot summer months.
We highly recommend that you get an aquarium chiller that is more powerful than recommended. This is because as you go from the less powerful to more powerful aquarium chillers the price does not increase much while the capability increases greatly. This will increase the longevity of the unit, save electric cost, and will decrease the amount of noise generated by the aquarium chiller.
Corals come from a variety of ocean enviroments where the temperature ranges from the low seventies to the low nineties. Ideally, you would stick to corals from a single environment and maintain your tank at the normal temperature for that environment. However, since most reef aquariums have a variety of corals from different marine environments, sticking to the 78-80 degree range is a safe choice.
An aquarium chiller operates on the same principles as a refrigerator or air conditioner. There is a thermostat control unit on all chillers which allows you to set the optimum temperaturefor your water to be at. The workings are based on principles of gas expansion and contraction. A refrigeration gas, such as freon, is compressed, which results in a loss of termperature. This compressed gas flows through the heat exchanger where it picks up heat from the aquarium water being pumped through the heat exchanger. The gas carries the heat back to the compressor, but on the way encounters the expansion valve, which allows pressure to drop suddenly. As the pressure drops, the gas gives up heat to a radiator, which dispels the heat into the surrounding air with the aid of a fan. Hence, the water returning to the aquarium will be at a lower temperature then when it entered the unit.