Best Heater For 5 Gallon Betta Tank | Aquascape Addiction

Best Heater For 5 Gallon Betta Tank

We cover our top 5 picks that we feel qualify as the best heaters for 5 gallon Betta tanks, we review each of them in detail covering features, pros and cons to help you decide on the right option for your aquarium.

Best Heater For 5 Gallon Betta Tank

Betta fish do like their water to be warm, slightly above room temperature. Seeing as this cannot be achieved by simply letting the tank sit in a room, you will probably need a good little water heater for your tank.


Today we want to look at some options which we feel qualify as some of the best heaters for 5 gallon Betta tanks (this one is our top pick). Let’s get right to it and take a look at our Top 5 picks that we felt are worth a mention.

IMAGE PRODUCT INFO OUR RATING
Tetra HT Submersible Our Top Pick 9.6/10
Penn Plax Submersible 25 Watts 9.3/10
Marina Submersible 25 Watts 9.3/10

Best Heater For 5 Gallon Betta Tanks: Top 5

Here are our top 5 picks with a detailed overview of each. If you need help with tank suggestions then this post will help you.

1. Tetra HT Submersible Aquarium Heater

The Tetra HT Submersible heater has an indicator light which turns on whenever the heater is on. This means that you will never mistake this heater for being on or off when the opposite is the case. The light is red when heating and turns green when the ideal temperature has been achieved.

This heater features a built in thermostat which maintains water temperature at 78 degrees. Some people don’t like how you cannot adjust this heater, but others like it for this very reason. Simply put it in the water, turn it on, and it is good to go. This particular heater is more than ideal for aquariums between 2 and 10 gallons in size, especially if the tank has a good lid or hood.

It’s a cool heater because it can be put in an aquarium both vertically and horizontally. It is very easy to install, plus it is fairly small, so it does not take up very much room inside of the tank. Simply use the suction cup to attach it to the interior wall of your aquarium. Be sure to place the heater inside of the water before plugging it in. This is a very simple and basic heater. It does not have many fancy features, but it does the job just fine.

Pros


  • No adjustments required.
  • Easy to install.
  • Does not take up much space.
  • Has an internal thermometer.
  • Can be installed vertically or horizontally.
  • Good for aquariums between 2 and 10 gallons.

Cons

  • Cannot be changed from 78 degrees.

You can check the current price here

2. Penn Plax Aquarium Heater

This particular one is a 25 watt heater that is ideal for aquariums up to 5 gallons in size. That being said, this heater does also come in several other versions, each of which is ideal for larger aquariums. Many people hail the Penn Plax Aquarium Heater as being one of the most accurate around, being able to heat the water and maintain the temperature within 1 degree, which is of course quite important.

Now, the Penn Plax heater does have a preset temperature of 76 degrees, but you can actually program it to be warmer or colder, which is pretty convenient if 76 degrees is not what you need. Being easily programmable is a big bonus that you get with this particular aquarium heater. On a side note, what many people will like is that this thermometer can be switched between Fahrenheit and Celsius for ease of use.

This heater is fully submersible, so you know that water will not damage it. It is a fairly simple water heater in the sense that you just plug it in and it is good to go. Just be sure that it is fully submerged underwater before plugging it in. We do like how this model is very easy to install.

Simply use the included suction cup to place it on an interior wall of your aquarium. It is fairly space friendly and can be installed either vertically or horizontally. It is also a good option because it can be used for both saltwater and freshwater aquariums.

Pros

  • Space saver.
  • Easy to use.
  • Plug in and go.
  • Can be programmed.
  • Comes in F and C.
  • Suction cup for easy installation.
  • Very accurate.
  • Good for salt and freshwater.

Cons

  • Not too durable – fairly short lifespan.

You can check the current price here

3. Fluval Marina Submersible Heater for Aquarium

This next water heater is classified as a mini heater, which based on its size is definitely true. Lots of people really like the Fluval Marina due to its very small size. Small aquariums are already tightly pressed for space, so having a heater that preserves as much prime real estate as possible is always handy.

The Fluval Marina heater is fully submersible and has a totally waterproof seal to make sure that the internal components do not suffer from any kind of water damage. It also has an impact resistant design. This is important in case you drop the thing by accident or if some rowdy fish happen to bump into it. It does have a bumper guard to keep fish and the heater safe.

The Fluval Marina heater comes with easy to use brackets and suction cups, so it only takes a few seconds to mount on the interior of your aquarium. This model can only be mounted vertically, but that is not a big deal seeing as it is so small to begin with. When it comes to getting started, the heater itself only needs to be plugged in and it is good to go.

This model has an easy to use temperature setting dial and has a fairly good temperature range too. It is great for most small aquariums, especially tropical ones. It does come with a light to let you know when it is running. Also, it can be used in both saltwater and freshwater, something which many people will appreciate.

Pros

  • Easy to set temperature dial.
  • Easy to install.
  • Fairly durable.
  • Comes with suction cups.
  • Good for fresh and saltwater.
  • Space saver.

Cons

  • May not be all that accurate at times.

You can check the current price here

4. Hydor Slim Heater for Bettas

This is definitely one of the more unique water heaters for betta tanks out there right now. Unlike traditional heaters which are long and tubular in shape, this one is like a flat oval that sits on the side of the aquarium. It may not look all that nice, but its shape is convenient because it barely takes up any room at all inside of your betta tank. Even though the Hydor Slim Heater is very small, it is still quite powerful and can easily heat up a tank of 5 gallons.

The element inside of the Hydor Heater is designed to heat up a tank or terrarium to around 10 degrees warmer than room temperature, making it ideal for bettas. That being said, it is a simple plug in and go water heater. In other words, it has a set temperature that cannot be adjusted. This is something that some people don’t mind, just as long as the required temperature matches the heater’s setting.

What is pretty neat here is that there are no glass components. The exterior is made of a hard rubber which is very durable. The heater won’t break and it won’t hurt your fish either.

Maybe one of the coolest parts here that we liked is that you can hang it on the side of your aquarium or you can out it under the gravel too. The Hydor Heater is definitely a versatile water heating option to consider.

Pros

  • No adjustments required.
  • Plug in and go.
  • Can be put under gravel.
  • Very durable.
  • Safe to use.

Cons

  • Cannot be adjusted.
  • Looks funny.

You can check the current price here

5. Cobalt Aquatics Mini-Therm Heater

Unlike the previous heater which was made of rubber, this one is made of glass. This does make some people worry due to durability issues, but the Cobalt Aquatics Heater is made with a shatter proof design that makes it difficult to break. The internal components will not be exposed to water, your fish won’t get electrocuted, and this little guy is proven to have a long life.

We do also like how this heater is very small and compact. It is round and tubular in shape, just like most other aquarium heaters out there. However, its very small and compact build makes sure that it does not take up too much space inside of your betta tank.

This heater can be used for both freshwater and saltwater aquariums though it cannot be adjusted in terms of the temperature.

It is rated to raise the water temperature to around 10 degrees above room temperature. Simply plug the Cobalt heater in and let it do its job. It really does not get any easier than that.

Pros

  • Very easy to use.
  • Space saver.
  • Good for salt and freshwater.
  • Plug in and go.
  • Shatterproof design.

Cons

  • Cannot be adjusted for temperature.

You can check the current price here

Conclusion

When it comes to finding the right heater for your 5 gallon Betta tank there are plenty of options out their but the above 5 will certainly do the job. We hope we have helped you on your Betta heater search!