Well, that really depends on your situation, is the short answer.
Here’s the long answer:
If you’re only interested in an aquarium chiller because you live in a warm climate where it’s difficult to control the temperature of your tank in the summer months, or even parts of spring and fall, then no - you don’t need an aquarium chiller in the winter. That said, it’s still the best time of the year to find deals on aquarium chillers, since they sell at a premium in the summer when buyers tend to run into the store desperate to save their tank.
If you use metal halides, however, you may still want to use an aquarium chiller on your tank, particularly if you have a small water volume. I know a lot of people who link to grow SPS corals in nano cubes or other small tanks because they live in apartments or don’t have a large room to dedicate to their aquarium, which leaves them with a lot of powerful lights and not much water volume to dissipate the ambient heat. In this case, an aquarium chiller is an essential piece of equipment year-round to balance out the heat from your lighting rig, although you may need to adjust the temperature in the winter to account for the change in weather.
And if you own a larger tank? That really depends on your tank volume and lighting rig. I know a guy who needs two chillers to cool his 200g tank because of the number of high-intensity lamps that he’s using to light his coral; however, many other hobbyists will be able to properly balance their lighting and tank volume. Ultimately, the aquarium chiller is just another tool to allow you to manipulate the tank space and lighting that is available to you. If you have no interest in stony corals, an aquarium chiller is probably overkill, unless you live in Texas or somewhere similar. However, if you’re interested in a full, vibrant reef set-up, and the kind of lighting that it requires, you’re probably going to need a chiller for at least part of the year.
Check out the store to learn more about what options are best for a tank and lighting set-up like yours.
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