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The Best Aquarium Heaters for Your Tank

Every aquarium owner should ensure that the life inside their aquarium is kept at an ideal temperature for their fish friends to thrive. There are many great aquarium heating options on the market today that are safe to use, user-friendly, affordable, and that maintain a stable temperature.

In this guide, we’ll showcase some of the best aquarium heaters you can buy and let you know some important factors to consider to ensure you make an educated decision when choosing the perfect aquarium heater for your needs.

Shopping for an Aquarium Heater

Keep these key factors in mind when looking for a new aquarium heater:

  • Tank Size: The size of your tank is very important, as this will largely determine what kinds of aquarium heaters you will be looking for. Naturally, high-wattage options are ideal for larger tanks as they can bring the water temperature to the desired level quicker and help it stay there while minimizing its operation time.
  • Durability: While no aquarium heater is break-proof, finding one with features such as shatterproof glass and an overall rugged design can prevent you from having to replace it during ordinary use. Additionally, it is very important to follow an item’s instructions when installing or removing aquarium heaters since this is when breakage is most likely. Thus, you should also seek out a model that comes with clear instructions.
  • Ease of Use: Thankfully, most aquarium heaters are very simple to set up and operate. Seek out a product that can automatically power on and off in order to efficiently maintain your target temperature. Finding a model that makes changing the target water temperature as easy as possible is also a good idea.

Now that we’ve gone over some aquarium heater basics, let’s check out some of the best aquarium heaters on the market today!

Best Overall: Mylivell Aquarium Heater

Featuring high-quality quartz glass and two suction cups that maintain a strong, secure hold, the Mylivell Aquarium Heater represents the gold standard for those who wish to heat their aquarium on a budget. The thing that sets this fresh and saltwater-safe unit apart from the pack is its consistent accuracy and rugged durability. Although no aquarium heater is truly break-proof, this one has a great thickness to its glass and should last a long time if one follows the instructions during use. Speaking of instructions, this unit comes with very clear ones that are easy to follow, which can not be said about all aquarium heaters.

Best Overall

Mylivell Aquarium Heater Submersible Auto Thermostat Heater,Fish Tank Water Heater and Adjustable Temperature with Suction Cup-100W

This aquarium heater comes in four different wattage offerings that are suitable for tanks between 10 to 100 gallons.

Best Value: Bnzaq Fish Tank Aquarium Heater

The Bnzaq Fish Tank Aquarium Heater features six wattage options as well as shatterproof glass and BPA-free plastic construction to help ensure the safety of your beloved fish. This aquarium heater sports an adjustable temperature between 68 to 93 degrees Fahrenheit and does well to maintain a high degree of accuracy. The extra-long power cord is also a great addition and will definitely save some people from having to fetch an extension cord. Factor in the sleek, low-profile design and free aquarium decorations that are included with your purchase, and you can see why this product is such a great value.

Best Value

Bnzaq Fish Tank Aquarium Heater - Adjustable Temperature Submersible Thermostat Heater,25W/50W/100W/150W/200W/300W

This aquarium heater features accurate automated temperature regulation and an adjustable temperature between 68 and 93 degrees Fahrenheit.

Best for Large Tanks: Eheim Jager Aquarium Thermostat Heater

Eheim Jager has been in the aquarium heating game for a long time, so it’s no wonder why the Eheim Jager Aquarium Thermostat Heater is a go-to product for heavy-duty aquarium heating needs. While these units run pricier than our other picks, the even heating that the high-wattage models offer is great for larger tanks. This aquarium heater also offers a nice safety feature for when the water level drops to an unsafe level and sports shock-resistant and shatterproof glass.

Best for Large Tanks

EHEIM Jager Aquarium Thermostat Heater 300W

This 300-watt aquarium heater features a TruTemp dial that recalibrates the heater for precise temperature regulation.

Best for Small Tanks: Fluval M50 Submersible Heater

Aquarium heaters can be an eyesore in smaller tanks, but the Fluval M50 Submersible Heater’s low-profile, reflective design makes this unit one of the least conspicuous options on the market. This aquarium heater features an easy-to-adjust temperature control dial. Also, sporting shock-resistant borosilicate glass and a high-density ceramic heat sick, this aquarium heater is plenty sturdy if treated with care. For those with fish tanks no larger than 15 gallons, this is one of the best 50-watt options you can get.

Best for Small Tanks

Fluval M50 Submersible Heater, 50-Watt Heater for Aquariums up to 15 Gal., A781

This aquarium heater features a low-profile design that will not be an eyesore even in smaller tanks. It also sports an easy-to-adjust dial for temperature control.

Most User-Friendly: Uniclife Aquarium Heater

For tropical fish owners with 5-to-20-gallon tanks and no time to tinker with an aquarium heater, this offering from Uniclife is as straightforward as it gets. Featuring a non-adjustable preset temperature setting of 78 degrees Fahrenheit (widely regarded as the sweet spot for tropical fish), this unit simply has to be installed and plugged in to be ready to go. It is also highly accurate, which is to be expected given its simplified design. Like most other aquarium heaters, this product features automated on/off functionality to help your water maintain a perfect temperature.

Most User-Friendly

Uniclife Aquarium Heater Preset Submersible with Electronic Thermostat for 20 Gallon Fish Tank Heater 100W

This aquarium heater features a non-changeable preset temperature of 78 degrees Fahrenheit, which is ideal for tropical fish to thrive.

Zachary McCarthy Zachary McCarthy
Zachary McCarthy is a freelance contributor to LifeSavvy. He has a bachelor's degree in English from James Madison University and experience in blogging, copywriting, and WordPress design and development. In his free time, he can be found frying up Tangsuyuk or watching Korean films and MMA events. Read Full Bio »

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