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How to Choose the Right Chiller

How to Choose the Right Chiller

A constant, appropriate water temperature is vital to keeping your aquarium's inhabitants healthy. A sudden temperature change can place undue stress on your aquatic life, increasing their susceptibility to infection and disease.

Chillers Aquarium setups - reef aquariums in particular - often employ high wattage equipment, lighting and water pumps especially, that produces enough heat to raise water temperature. Without a chiller to decrease water temperature, aquarium water can warm to a point where it no longer holds enough oxygen to sustain the inhabitants.

If you need a chiller, plan it into your system as early as possible. Chillers are external units that often require plumbing and always require adequate space and sufficient ventilation. They give off significant amounts of heat when in use. In fact, you should avoid placing your chiller in an enclosed aquarium stand, because it can give off enough heat to raise water temperature.

Thermoelectric Chillers
Quiet, energy-efficient thermoelectric Chillers, are intended for use with smaller freshwater and saltwater aquariums, less than 30 gallons, and insulated bait/specimen tanks with a slow water flow. Thermoelectric chillers are not effective on large aquariums with a fast water flow.

In-Line Chillers
Intended for use on larger systems with in-line filtration, in-line chillers cool already-filtered water, and are used primarily with saltwater reef setups. In-line chillers are available in several sizes, from 1/5 to 1/3 HP, and therefore work with several sizes of aquariums. These chillers require plumbing, and should be incorporated into the overall aquarium plan prior to execution.

Drop-In Chillers
Drop-in chillers have a probe that is placed directly into wet/dry filters or any filter with a sump, and are used primarily with saltwater reef setups. Drop-in chillers are available in a variety of sizes and power. Because they require no plumbing, drop-in chillers are ideal for systems with limited space.

Factors to consider when choosing a chiller
When choosing a chiller, consider your aquarium size, additional equipment and the heat it generates, your aquarium setup, and the temperature requirements of your aquarium inhabitants. Choose a chiller that effectively cools your aquarium water in the space and setup you have allotted. If your cooling requirements are on the upper end of what is recommended, choose the next largest chiller to ensure an adequately cooled aquarium and healthy inhabitants.


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