5 Best Aquarium Heaters: Top Picks for 2019

What is the Best Aquarium Heater Brand?

Every species of fish lives in a specific environment and water temperature. However, fish cannot produce body heat, and this is why they require a heater when kept in an aquarium. Some species require cold water; some require a hot water level which is way above the room temperature. In some cases, this is crucial for your aquarium, so it is always best to be ready!

You may be asking yourself, what is the best aquarium heater brand?

In this article, we aim to provide you with a small list of the best aquarium heater and brands that are currently on the market. We will cover the perfect choices for small and large tanks, and in the end, give one overall top pick. All heaters on our list are specifically chosen based on technology and features per price. You can find all our choices at the best current prices!

Top Overall Pick: Best Aquarium Heater

By: Cobalt Aquatics

  • Technologically advanced
  • Thermal protection system
  • Space-saving design
  • One-touch system and LED display
  • Shatter-proof

Our top choice for the best aquarium heater type in 2019 is by Cobalt Aquatics. Their model comes in 9 sizes starting from 25 to 400watts(6 gallons to 125 gallons). You will not go wrong with any of the variations, and you can easily find the one that is perfect for your tank in the table provided by Cobalt Aquatics online.

This model is like no other on the market. It has an extremely thin flat design and is fully submersible. The control system is one-touch, and the LED display monitors the set temperature and the current temperature in the tank simultaneously.

The Neo-Therm Heater also cannot overheat. It has a system which shuts it down before this could happen. Also, it is shatter-proof!

By: Hydor

  • External
  • Powerful
  • Silent
  • Easy maintenance
  • Smart temperature control

This is the only External Heater on the list. The Hydor In-Line External Heater is supposed to be used with a canister filter or in situations when you just do not want the heater to be visible inside the aquarium. Also, this heater comes in three different variations, all of them being above 200 watts. If you have a small aquarium, you will most likely not need something so strong.

The heater can be used with both fresh and saltwater aquariums. The internal pump system promises a steady heating process without any variations in temperature.

This model is absolutely silent, so you shouldn’t be expecting any noises. It is not a low budget heater but being external it allows you to maintain and use it easier than internal models, and without touching any water.

By: Eheim

  • Submersible
  • Thermo Safety Control System
  • Durable
  • Low water level automatic turn off
  • A wide range of wattages

This model by Eheim offers a wide range of wattages, so you can check and choose the perfect one for your aquarium. You can pick from 8 different ones, from 25 to 300 watts. Furthermore, this heater model is packed with a lot of exciting features.

One, for example, is the Thermo Safety Control which prevents it from running dry. Then we have a system which turns it off when the water levels are not high enough. Finally, it is tough to break, and it will endure a lot!

By: Marineland

  • User-friendly
  • Safer than most
  • Turns off automatically if needed
  • Sliding scale for temperature setting
  • Mica core for better heating

Being one of the safest models on the market, this model will surely not bother you in any way. You can choose between a variety of wattages, from the smallest of 25 watts to the 400-watt one for large tanks.

More importantly, the Marineland Precision Heater is equipped with a safety switch to prevent failures. It is incredibly user-friendly, and the temperature is easy to adjust. Furthermore, it automatically turns off when the temperature rises above the preset levels. It has an advanced heating element with a mica core for a much higher quality heating.

Two things to think about – the heater needs to be fully submerged in the water, and you also need to be careful with it because it is not shatter-proof. 

Top Pick: Best Heater for 75 Gallon Aquarium

By: Fluval

  • Integrated fish guard
  • Real-time temperature
  • High-tech status screens
  • Durable
  • Powerful

This is our top choice for large aquariums as big as 75 gallons. Fluval offers a wide range of wattages for this model, but we are addressing the most powerful one. You cannot go wrong with this heater, and it is the ultimate best in terms of technology and performance.

An Intelligent digital microprocessor monitoring system will monitor and display the water temperature in real-time. There are also three status screens in green, blue and red. The green one indicates that the real-time temperature is in the desired range, the blue one means that the temperature is too low and you need to increase it manually, the red screen indicates that the temperature is above the desired levels and needs to be decreased manually.

Fluval also gives a 5-year warranty which is a big plus for long-term usage.


Setting up a great aquarium is not cheap. However, you definitely need to invest in a reliable heater. There are too many brands and options on the market, most of which unreliable and false. Be sure to pick one of the better ones and the one that is perfect for your type and size of the aquarium.

What you need to look for is watts availability, temperature control, safety like automatic shut-off, and durability.

We accumulated our top choices guide specifically from those characteristics. Make sure you get a good look at all of them before you choose. All models are available for purchase on Amazon at the best market prices!