Best Aquarium Heaters: Our Picks for Your Aquarium

Marine Depot's Best Aquarium Heaters

While the summer heat continues to wind down, before you know it, hobbyists across the world will be swapping out their aquarium chillers for a compact, effective, and reliable heater. Over the years, the market has become saturated with a plethora of options in all shapes and sizes when it comes to heaters. While the main goal of keeping a reef tank between the temperatures of 76 and 80 degrees remains the same, the heaters which allow you to achieve those temperatures have continued to evolve. 

Within this detailed report, Marine Depot wants to give you the rundown on which heater will fit best with your own aquarium. The main categories we will be looking at include the best budget heater, the best heater for a nano tank, and the best overall heater. 

Best Aquarium Heater on a Budget: Eheim Jager TruTemp

A quick guide on the Eheim Jager

The Eheim Jager TruTemp Fully Submersible Heater embodies the statement, “If it ain’t broke…Don’t fix it”. While this heater has changed very little over the past 5 years, it is still one of the most well built, reliable, and budget friendly heaters around. In addition to being fully submersible, this heater also features run-dry protection that will turn off the heater if it is no longer submersed in water. The shatterproof glass adds to the durability that you have come to expect from all Eheim products. You would be hard pressed to find a more durable, reliable, and proven heater on the market while still coming in at a budget friendly price. 

Best Heater for Nano Systems: Cobalt Aquatics Neo-Therm

Eheim Jager TruTemp Heater
Cobalt Aquatics Neo-Therm Heater in box.

Nano systems have been a huge trend in the aquarium industry for years. These tanks are currently the most popular size range for entry level hobbyists. Space is at a premium within these small systems and finding a heater that can fit without compromising on quality can oftentimes be difficult. That is why the Cobalt Aquatics Neo-Therm is one of the best aquarium heaters for a nano tank. The slim profile and easy to set, “One touch” display gives the Neo-Therm the upper hand when it comes to squeezing it into tight spaces. An ultra-accurate thermostat and LED display rounds out this compact, effective, and durable heater. Even in the tightest of spaces, Cobalt has found a way to keep your tank at the proper temperature.

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Best Overall Heater: Finnex HMA-S With Guard and Analog Controller 

Finnex HMA-S Heater
Finnex HMA-S Heater.

The Finnex HMA-S series is a great line of heaters that are built to last. While this is certainly an inexpensive heater, many of the features you would come to expect in a higher budget option are prevalent. This includes an external analog controller that allows for quick and easy temperature adjustments without getting your hands wet. The titanium built heater is even more durable than shatter resistant glass and they can be used in freshwater, saltwater, and reef aquariums. The features and durability built into this product are elite and that is why it is one of the best aquarium heaters on the market. 

a Heater for Every Tank:

Heaters are an essential part of our hobby to protect our most beloved tank inhabitants and to make certain that they are stress free and happy. Our three best options each come in different sizes that would allow you to select one of the best aquarium heaters for each of your systems. If you have any additional questions or, you are in need of a specific recommendation, please reach out to our customer care team and they will be happy to assist you.

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