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Best Heater For 3.5 Gallon Betta Tank Reviews in 2022

Do you want to purchase the best heater for 3.5 gallon betta tank? Are you having a hard time finding the best betta fish tank heater? If yes, stay tuned with us as we have the most premium Recommendations for you!

Generally, Betta fishes live in the tropical water which is comparatively warmer than regular water of the houses. Moreover, the temperature of the home tank tends to change often depending on the outside environment. However, bettas are pretty sensitive and a bit of temperature fluctuation can affect their overall health. Only the best water heater for betta fish can assist in this regard.

In this content, we have picked the 10 best betta tank heaters and have reviewed them in detail. We have also included essential guidelines and FAQs to clear up the confusion. So, hang on with us till the end and keep the bettas safe & sound.

Our Top Picks!

It’s a highly adjustable water heater with maximum safety features to keep the bettas safe and sound.

It’s a high quality yet affordable water heater to maintain a consistent temperature throughout the tank.

It’s a compact & durable unit to ensure superior efficiency and longevity.

It’s a quality betta tank heater with a thermostat to maintain a consistent temperature around 73° to 82°F.

It’s a durable yet lightweight betta tank to ensure proper space for the loving bettas.

This unit is marvelous and the natural sounds are pretty soothing.

It’s a perfect-sized aquarium with powerful filters to keep the bettas cheerful.

This heater is super accurate due to the high sensitivity of the internal probe.

ZEETOON is a very high-quality heater to maintain a constant temperature all over the tank.

This unit is the best one among all for its efficiency in maintaining the temperature from 77°F to 82°F.

 Reviews On The Best Betta Fish Tank Heater: Check The Top Recommendations In 2022!

Here you will find the best heater for 3.5 gallon betta tank reviews with their specifications and users’ points of view. This will help you to choose a suitable product for you. So, let’s see-

FREESEA Aquarium Heater With Submersible Thermometer

FREESEA Aquarium Heater With Submersible Thermometer

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Freesea has dedicated themselves in manufacturing appliances that can ensure optimum growth of the pet fishes. From that dedication they have invented the FREESEA aquarium heater with a submersible thermometer.

Different types of fishes prefer different water temperatures to live in. This unit will help you in this regard as you can accurately determine & control the aquarium’s temperature. Adjust it between 63°F to 95°F as per requirements and keep the pet fishes healthy & happy.

Specifications:

Brand: FREESEA.
Item Dimensions: ‎10.75″ x 2.99″ x 2.13″.
Color: Black
Unit Count: 1.
Upper Temperature Rating: 95°F.
Item Weight: ‎7.4 ounces.
Size: 25 W.
Power Cord: 4.9 ft.
Voltage: 110V-120V.
Heater length: 6.8 inches.

Features:

⦁ It is a submersible 25W water heater which can easily support an aquarium of one to five gallons.
⦁ Users can adjust the tank’s temperature from 63°F to 95°F.
⦁ This unit also features a diving thermometer to check out the temperature over time.
⦁ By using its temperature controlling system, the heater can turn off automatically after reaching the required temperature.
⦁ The brand has also featured safety features like – automatic shut off and overheating protection.

Warranty Solution:

FREESEA is quite confident about their product’s build quality & features. That’s why they have implemented a one year warranty along with 24-hours after sell service.

Pros
  • It’s an efficient submersible water heater especially suitable for small tanks. It is highly adjustable and features all the safety features including auto turn off. The light indicators are quite helpful as they can properly indicate whether the heater is on or off.
Cons
  • The thermostat will take some time to show the accurate temperature.

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BOEESPAT Small Aquarium Heater Fish Tank Heater

BOEESPAT Small Aquarium Heater Fish Tank Heater

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BOEESPAT is a professional heater manufacturer which has been working for years to provide a comfy life to the reptiles & fishes inside the aquarium. As bettas can’t live in the fluctuating environment, this unit tends to maintain a constant temperature around 78°F.

Specifications:

Brand: BOEESPAT.
Item weight: 5.3 ounces.
Size: 25 Watt.
Package Dimensions: ‎4.84″ x 3.82″ x 1.65″.
Voltage: 110 V.
Suitable For: 1-6 gallon tank.
Accuracy: ±3°F.

Features:

⦁ BOEESPAT water heater is suitable for all aquariums of small size (from 1 to 5 gallons).
⦁ This unit can heat the tank at 78°F when it is completely submerged within the water. The bettas can enjoy a healthy and cheerful life at this temperature.
⦁ The brand has included a free thermometer to check out the water’s temperature regularly. Just stick the thermometer outside the tank and you are ready to go!
⦁ They have offered a durable design with necessary safety features.

Warranty Solution:

For the customer’s utmost convenience and satisfaction, the company has featured a limiter one year warranty and 24 hour Customer service after the purchase.

Pros
  • It is the best heater for 3.5 gallon betta tank for the price. As it’s super easy to adjust, you don’t have much worries even if you are a beginner.
Cons
  • This unit can maintain a consistent temperature but it is not too accurate.

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DaToo Small Aquarium Heater

DaToo Small Aquarium Heater

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Most of the water heaters of the market are pretty big for a two to three-gallon betta tank. If you install a big heater in the tank; it will eventually restrict the movement of the bettas. I bet you don’t want such inconvenience. That’s why DaToo has come up with a small aquarium heater for betta fish which can easily support a two to three gallon tank.

Specifications:

Power: 20 Watt.
Output Voltage: 24V
Size: 3″×2″×0.26″.
Suitable For: 2 to 3 gallon tank.
Temperature: 75°F to 82°F.

Features:

⦁ DaToo aquarium heater is a classy device especially suitable for small tanks measuring around 2 to 3 gallons.
⦁ Its heating elements are designed to maintain a constant temperature around 75°F to 82°F.
⦁ This unit is convenient to use. Just plug it in and the 20W heater is ready to function.
⦁ Its output voltage is around 24V which is safe for both the fish & the owner.
⦁ DaToo aquarium heaters must be entirely submerged to commence its functions properly.
⦁ This device turns off automatically if it’s somehow above the water level.
⦁ It features PTC which has superior thermal conductivity & high heating rate.
⦁ We would only recommend it for freshwater.

Warranty:

This unit has a 12 months warranty to ensure 100% convenience of the customers.

Pros
  • It’s a high quality PTC heater that won’t shatter easily. Customers have loved its overall efficiency & speed.
Cons
  • Some customers had issues in maintaining the temperature of the water. In this context, it’s a must to go for an inline temperature controller for proper monitoring.

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ZEETOON Automatic Thermostat Betta Fish Tank Heaters

ZEETOON Automatic Thermostat Betta Fish Tank Heaters

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ZEETOON fish tank water heater is super efficient in maintaining a constant temperature that will keep the bettas healthy and happy. It is suitable not only for betta tanks but also for goldfish, tropical fish, ornamental fish and many more. Now winter is no longer scary for the bettas & turtles as they can be at ease with the warmth of the ZEETOON 25W Aquarium Heater.

Specifications:

Brand: ZEETOON.
Color: Black.
Unit Count: 1.
Temperature Rating: 93°F.
Package Dimensions: 6.38″ x 3.19″ x 1.81″.
Item Weight: 6.7 ounces.
Size: 25 W.
Suitable For: 2 to 5 gallons.
Voltage: 110 to 120V.

Features:

⦁ ZEETOON Automatic Thermostat heater can maintain a comfortable temperature (73°F- 82°F) for the little bettas.
⦁ It’s a perfect unit for small aquariums measuring around 5 gallons.
⦁ This unit is designed to save energy by an accurate circuit board & thermostat heating system.
⦁ It can prevent fire hazards and electric shocks by its advanced safety features.

Pros
  • ZEETOON water heater is a perfect thermostat for a 3.5 gallon aquarium. It can ensure a consistent temperature to keep the bettas healthy.
Cons
  • The thermometer is quite big.

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Koller Products AquaView 3.5-Gallon Fish

Koller Products AquaView 3.5-Gallon Fish

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Koller Products have been selling millions of aquariums every year. Even in this crowd, Koller aquariums are still in the top due to their quality construction, premium filters, dazzling LED illumination and many more.

Specifications:

Brand: Koller Products.
Color: Crystal-Clear.
Material: Plastic.
Item Dimensions: 11.25″ x 8.75″ x 13.5″.
Item Weight: 3.8 lbs.

Features:

⦁ Koller aquarium features seven dazzling LED lights to improve the overall looks of the aquarium.
⦁ Its premium filters are pretty efficient in cleaning water at a rate of 25 gallons in every hour.
⦁ Even though the aquarium is made up of impact resistant plastic, it’s totally leakproof.
⦁ As it features an unique design, users can enjoy multiple views from different angles.

Pros
  • It’s an incredible 3.5 gallon tank to keep the bettas active and happy. It’s super lightweight and easy to clean as well. As it offers lights of various colors, users can enjoy a great view from different angles.
Cons
  • It’s filter design is a bit poor.

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Koller Products 3.5-Gallon Aquarium with Sleep Sound Machine

Koller Products 3.5-Gallon Aquarium with Sleep Sound Machine

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In order to relieve the daily stress, Koller Products has come with a 3.5 gallon aquarium with a soothing sleep sound. The built-in sound system is loaded with mp3 files that can calm you down while you enjoy the dazzling view of the aquarium. The internal filtration is pretty powerful as they offer a flow rate of 25 gallons per hour.

Specifications:

  • Brand: Koller Products.
  • Color: Clear.
  • Material: Plastic.
  • Item Dimensions: 11.2″ x 8.75″ x 13.5″.
  • Item Weight: 3 lbs.

Features:

⦁ It’s a classy aquarium with a highly functional sound machine that can make you sleepy by the sounds of ocean waves, rainfall, or thunderstorms.
⦁ The sound machine is loaded with a micro SDHC that contains multiple mp3 files.
⦁ It features dazzling LED lights which are super efficient in utilizing energy.
⦁ The internal power filter has a flow rate of 25 gallons per hour to wash away impurities & fish debris.
⦁ It’s based on an impact resistant plastic design to ensure high longevity, strength & durability.

Pros
  • It’s a high quality tank especially suitable for beginners. The natural sound system is pretty awesome to lift up the mood.
Cons
  • Overall filtration system is not good enough.

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Koller Products 3.5-Gallon Aquarium With Power Filters

Koller Products 3.5-Gallon Aquarium With Power Filters

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Do you want to purchase a classy betta aquarium to relax and calm yourself? If yes; Koller AquaView 3.5-gallon aquarium is the right choice indeed. In order to enhance the view, the brand has featured multiple features including – high-energy LED lights with multiple colors & internal power filters.

Specifications:

Brand: Koller Products.
Color: Crystal-Clear.
Material: Plastic.
Item Dimensions: 11.25″ x 8.75″ x 13.5″.
Item Weight: 3 lbs.

Features:

⦁ In order to enhance the overall view; the aquarium is featured with multiple lights of seven dazzling colors.
⦁ The internal power filters are efficient in removing organic pollutants and debris at a flow of 25 gallons per hour.
⦁ Unlike typical glass aquariums, Koller aquariums are free from thr possibilities of leakage. That’s cause the aquarium is basically made up of impact-resistant plastic.
⦁ The aquarium is quite convenient to install.

Pros
  • It’s a perfect tank for betta as the fish gets enough space to play around. The power filters are efficient in Cleansing. However, users need to alter them every month for the best performance.
Cons
  • Some customers had issues with the lighting system.

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SZELAM Aquarium Heater For Small Tanks

SZELAM Mini Submersible Aquarium Heater

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SZELAM Aquarium Heater is a 100% submersible heater which is manufactured with classy black quartz sand & heat-resistant quartz glass. We have recommended it as the best water heater for betta fish for its smart heating, accurate temperature control, auto shut off and high temperature protection.

Specifications:

Type: Small Aquarium Heater.
Electric potential: 110V-120V.
Power: 25W.
Temperature precision: ±1℉.
Temperature scale: 64℉ to 93℉.
Cord extent: 39.37″+11.81″.
Heater proportion: 6″x1″.

Features:

⦁ It is a submersible water heater with precise temperature control.
⦁ This unit will turn off automatically if the heater is exposed to the air.
⦁ 25W heater is suitable for 1 to gallon tanks.
⦁ Heat resistant quartz and black quartz offer better safety features.

Pros
  • It’s a nice a d accurate heater to keep the betta safe. Customers have specifically loved the auto shutoff mechanism.
Cons
  • Some customers have complained about the quality of the suction cup.

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ZEETOON 25W Betta Tank Heater:

ZEETOON 25W Betta Tank Heater

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The brand, ZEETOON has come with a classy betta tank heater with a thermostat to keep the little fish healthy even in the winter. It’s thermometer strip will notify the exact temperature of the tank over time.

It’s an entirely submersible unit suitable for small aquariums of 20 L or 5 gallons. The brand had also offered two pieces of the artificial plant as a decoration piece. It will definitely impress your little bettas.

Specifications:

Brand: ZEETOON.
Color: Black.
Unit Count: 1.
Upper-Temperature Rating: 32°C.
Power 25W.
Suitable for: 5 gallons.

Features:

⦁ ZEETOON has come with an entirely submersible heater which is suitable for both fresh and brine water.
⦁ It comes with a thermometer strip to keep an eye on the tank’s temperature from time to time.
⦁ By the adopted circuit board and thermostat heating system, the heater can set a stable temperature around 73°F to 82°F.

Warranty:

The brand has provided a one-year assurance on the quality of the product.

Pros
  • This is one of the best tank heaters for betta fish tanks as it can maintain a constant temperature. It is super easy to install as well.
Cons
  • It’s basically not suitable for too small tanks.

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PGFUNNY 25W Aquarium Heater

PGFUNNY 25W Aquarium Heater

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PGFUNNY has come with a heater with built-in temperature control chip to automatically adjust the temperature as per the preferences. Like traditional heaters; you don’t have to worry about adjustments as the heater can automatically maintain within 25°C to 28°C. I believe everyone would love this unit as it is 100% safe, explosion and crack proof.

Specifications:

Brand Name: PGFUNNY.
Item Weight: 6.4 ounces
Manufacturer: ZENGH.
Item Package Dimensions: ‎6.4″ x 3.2″ x 1.8″.
Size: 25 W.

Features:

⦁ PGFUNNY aquarium heater comes with an automatic temperature control system to maintain the tank temperature within 77°F to 82°F.
⦁ By its auto shut down mechanism, the heater can turn itself off when temperature rises more than 82°F.
⦁ This 25W unit is specifically suitable for a 3 to 5 gallon betta tank.
⦁ The water heater is totally stable and energy efficient.
⦁ It’s built-in thermometer strip will allow to monitor the temperature over time.

Pros
  • Just like the advertisement, the heater is efficient in maintaining the temperature between 77°F to 82°F.
Cons
  • The thermostat is not accurate enough. So, go for a water thermometer for safety & double check.

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How To Choose The Best Betta Tank Heater In 2022?

Wattage:

Considering the wattage of the heater is certainly necessary as sufficient wattage refers to a consistent heat supply all over the betta tank. Generally, 3 to 5 watt water heaters are sufficient to heat up a gallon of water. So; for a 3.5 gallon betta tank you will require a heater of 10.5 to 17.5 watt (averagely 15W).
Adjustability:

In order to ensure the sound growth of the bettas, it’s best to go for an adjustable water heater. Adjustable ones are quite flexible and efficient in maintaining a consistent temperature. Users can turn it on/off as per their convenience and weather requirements.

Readability:

Readability is also an important factor to check out. If a user goes for a heater with a highly readable temperature scale, he will be able to set the tank temperature at the right level. Thus he can easily regulate the internal temperature to maintain an optimum growth.

Ease Of Usage:

We would highly recommend choosing a betta tank heater that is easy to use. In this context, go for a heater with a large & easily accessible control knob. However, it should not be too sensitive that the users have a hard time achieving the preferred settings. The overall installation procedure should be convenient too.

Safety Features:

The tank heater you are going to choose should be safe enough for you and your loving bettas as well. In this context; firstly check out if the heater is totally submersible in the water or not. If it is not rated for submergence, then go for a different one. Otherwise there are high chances that the bettas will be electrocuted at a different water level.

Automatic shut off is also a mandatory feature to look for as it can turn off the heater with a decrease of water level. Users can also look for accessory features like – shockproof & shatterproof construction.

FAQ:

  • What size heater do I need for a 3.5 gallon tank?

The size/wattage of the water heater is totally up to the size of the tank. As we already know, 3 to 5 watt is mandatory to heat up 1 gallon tank water. For a 3.5 gallon tank, a water heater of  15W averagely will be sufficient enough.

  • Is a 3.5 gallon tank good for a betta?

Yes, a 3.5 gallon tank is perfect for a betta. According to the rule of thumb, a betta tank should have a size of one gallon per inch of the betta. A betta usually measures around 2 or 2.5 inches. So, a 2.5 gallon tank is the minimum requirement for its living. The extra 1 gallon will be sufficient to keep it healthy & cheerful.

Final Verdict

Which one is the best heater for 3.5 gallon betta tank? I believe this was the basic query when you started reading our content. Obviously choosing the best one was super confusing as many brands can’t really provide whatever they have advertised.

That’s why we went through the whole market and have picked only the best ones with positive customer reviews.

All of our recommended betta water heaters are pretty efficient & I’m confident that you won’t regret investing in them. Among our picks I loved PGFUNNY 25W Aquarium Heater for maintaining a comfy temperature for the bettas to live in. Choose the heater that suits your requirements the most and keep the betta healthy as well as cheerful.

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