The 9 Best Aquarium Chillers

While some options attempt to make the "one size fits all" thing work, the Hamilton Technology Aqua Euro Max (around $700) offers five sizes, so you can grab the one that'll suit your setup. And you can feel confident that it'll run smoothly, thanks to its anti-freeze system.

The Nova Tec IceProbe (appx. $127) doesn't have some of the fancy features found on other models, but it doesn't have the high cost that these extras command, either. For instance, there is no integrated temperature controller, although you could add one, if you wanted to.

The titanium coil design of the JBJ Arctica (around $587) ensures excellent heat exchange, while the built-in thermostat is accurate and effortless to set. Plus, it's on the quieter side, so you won't constantly be alerted to its presence.

For the casual hobbyist, the EcoPlus Commercial Grade (around $1530) might be a little too beefy, but it is certainly tough enough for those with serious needs, whether for hydroponic systems or aquaria. This is due both to its flexible operability as well as its robust steel housing.

If you're concerned about the environmental impact of your gear, you might consider the Hydrofarm Active (appx. $600), as it uses Freon-free R410a refrigerant. It's also versatile, with an anti-corrosive titanium evaporator that's appropriate for both salt and fresh water.

Unlike some others, the Greensen Cooling and Heating Machine (about $91) arrives with a pump that makes it a good value, especially as a budget-friendly investment. Of course, as the saying goes, you get what you pay for, so you shouldn't expect industrial-strength quality.

This Chill Solutions CSXC-1 (about $250) was specifically designed for smaller tanks, those 30 gallons or under, and it offers steady results with a thermostat that can be set anywhere between 45 and 90 degrees. It's even appropriate for non-aquarium uses, such as in a research lab.

Dirty, dusty environments aren't good on your equipment, but the Coralife Energy Savers (around $480) has an answer. Its integrated air filter helps keep contaminants away from the cooling unit, which leads to better endurance and reliability. It's simple to remove for cleaning, too.

You shouldn't expect the power of a heavy-duty unit from the Yubo iPettie (appx. $39), since it's a basic fan system, but if both your budget and tank are diminutive, it just might work. It installs in a flash by way of a clamp mounting bracket.