To keep your aquarium running efficiently, it is important to maintain a steady, appropriate water temperature. Aquarium water chillers are designed to help you keep things running smoothly, as sudden drastic temperature changes can cause stress to your aquarium fish which may increase their chances of coming down with diseases or infections.

The higher the number of fish in an aquarium, the higher the risk that the oxygen levels will become depleted as the water becomes warmer. If you have a fresh or saltwater tank that is setup in an environment that is not climate controlled, it is important to keep your aquarium under-stocked.

Larger aquarium setups often use equipment, lighting and pumps that are capable of producing a sufficient amount of heat to raise the water temperature. Using a chiller to decrease water temperature, can eliminate the chances of the aquarium water warming to a point where it may potentially deprive the fish of oxygen. If you do install an aquarium chiller, it is best include it in the early planning and budgeting stages of your tank setup.

Types of Chillers:

In-Line Chillers
Generally used in larger systems over 55 gallons, especially saltwater reef setups, in-line aquatic chillers perform by pumping water through the unit and back to either a sump pump or the aquarium. They are available in several sizes, from 1/5 to 1 HP, and can work with several sizes of aquariums. These chillers may require plumbing, and should be palnned into the overall aquarium setup prior to completion.

Thermoelectric Chillers
These energy-efficient thermoelectric chillers are intended for use with smaller freshwater and saltwater aquariums, usually less than 55 gallons. These easy to operate chillers use advanced thermoelectric technology to convert electricity into cooling power directly. Thermoelectric chillers are not effective on large aquariums with a fast water flow. The chiller deploys a fan to dissapate tha heat that is generated during the cooling process. Because of this it is crucial to have adequate ventilation. If ventilation is not sufficient it is possible that the system may not function properly.

Drop-In Chillers
This type of chiller uses a probe that may be placed directly into any filter that uses a sump, and are generally used in saltwater reef setups. As they do not require plumbing, drop-in chillers are good for systems with that have limited space available. Drop-in chillers are available in a variety of sizes, 1/5 to 1/3 HP.

It is important to remember that you should not enclose the chiller inside a cabinet stand, unless the stand has been specifically made to house a chiller. Specialized cabinets generally have a square-foot opening along on one end for exhaust, along with a fan-assisted opening at the other end of the cabinet to draw in fresh air.

When it's time for you to choose a water chiller, you will need to consider a number of options. The tank, size, type of filtration system used, the ideal temperature for your tank, and the average amount of heat generated. It is important to adjust the chiller settings in relation to the climate and surroundings. Temperatures and equipment that are sufficient during winter months may not be adequate for harsh summer months.