The 8 Best Aquarium Heaters
We spent 26 hours on research, videography, and editing, to review the top choices for this wiki. When it comes to taking care of your fish, environmental maintenance is one of the most important considerations. For that reason, you'll need one of these reliable aquarium heaters to help you keep an eye on your piscine companions. Many function in both fresh and saltwater tanks, can shut off automatically, and can automatically change the water temperature when it fluctuates. When users buy our independently chosen editorial picks, we may earn commissions to support our work. Skip to the best aquarium heater on Amazon.
8. Marineland Precision ML90652
Good for handling tanks of up to 55 gallons in capacity, the Marineland Precision ML90652 combines the use of both its adjustable, incremental heating dial as well as its high-visibility temperature display to ensure the longevity and comfort of all of your fish.
- heating element has a mica core
- advanced mounting bracket
- cleaning it can be cumbersome
|Rating||4.2 / 5.0|
7. Xcellent Global PT027S
Durability describes the Xcellent Global PT027S, thanks to its high-purity, explosion-proof glass construction, which minimizes its chances for becoming brittle or rusting over time. Its thermal conductor is also made from fast-cooling and heat-resistant black gold.
- eco-friendly design
- large temperature range
- indicator light is annoying at night
|Rating||3.6 / 5.0|
6. EHeim Jager
With its fully shock-resistant glass jacket and versatile design, the EHeim Jager not only improves the efficiency of your tank's heat distribution process, but it can withstand use in either fresh or saltwater environments. It's also available in 8 different sizes.
- automatic shutoff if dry
- includes double suction cups
- initial calibration can be a pain
|Rating||4.4 / 5.0|
5. Milocos 300W Submersible
The Milocos 300W Submersible is constructed with sturdy quartz glass tubing and heat-resistant plastic sheathing. Leveraging its smart induction technology, it will increase the temperature of your tank water should it fall 3.6 degrees Fahrenheit below your preset value.
- built-in overheat protection
- ip 68 double sealing
- instructions are rather confusing
|Rating||4.3 / 5.0|
4. Hydor ETH T08203
Suitable for both marine and tropical fish and built to maximize the space within your tank's interior, the innovative Hydor ETH T08203 installs externally and vertically into the return lines of canister filters or sumps. Its built-in clamps also allow for easy plumbing.
- durable plastic casing
- extra-long cord
- it's a bit on the pricey side
|Rating||4.4 / 5.0|
3. Aqueon Pro 250
At its heart, the Aqueon Pro 250 features a resilient aluminum core that is designed to maintain steady temperatures between 68 and 88 degrees Fahrenheit. Its electronic thermostat will automatically shut the unit off when removed from your tank water.
- heater is shatterproof
- easy-to-use temperature control knob
- installs vertically or horizontally
|Rating||4.6 / 5.0|
2. Fluval A774
The Fluval A774 includes a digital microprocessor and 2 thermal sensors for sampling tank water directly through the glass of the device's heater tube, which greatly improves its level of accuracy and reliability over that of its bi-metallic strip thermostat counterparts.
- lcd readout changes color
- integrated fish guard
- sleek and slender design
|Rating||4.8 / 5.0|
1. Finnex HC-0810M
In a class all of its own, the Finnex HC-0810M offers built-in precision memory control that allows you to save your preset temperature in the event of a power outage, while its dual relay functionality will disable the heating element in case of potential overheats.
- audio alert system
- intuitive control box
- supports up to 265-gallon aquariums
|Rating||4.7 / 5.0|