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20 Best Heater For 2.5 Gallon Betta Tank (2022 Updated)

A heater for a 2. 5 gallon betta tank is a small aquarium heater that is used to maintain a consistent water temperature in the aquarium. Heaters for betta tanks typically range in size from 2. 5 to 10 gallons, and they are designed to be placed inside the tank.

20 Best Heater For 2.5 Gallon Betta Tank

Product Image Product Name Features Price

Marina Betta Fish Submersible Heater for Fish Tank Aquarium, 1.5 Gallons

  • 8-watt submersible fish tank heater for aquariums up to 1.5 gallons (5 L)
  • Creates ideal conditions for bettas to live in
  • Made of durable polymer, which is tougher than glass

Eccotemp EM-2.5 Electric 2.5 Gallon Mini Tank Water Heater

  • 2.5 Gallon

biOrb Heater Pack

  • Joint health supplement
  • Formulated with glucosamine and chondroitin
  • Most complete joint support supplement available

Fluval 'M' 50-Watt Submersible Heater

  • ‘m’ 50 W

Eheim GmbH Jager Aquarium Heater, 300 W

  • 300 W

Marina Betta Submersible Aquarium Heater

  • Creates ideal conditions for bettas to thrive in
  • Made of durable polymer, tougher than glass
  • Automatically reaches set temperature

Marina Betta Submersible Aquarium Heater 8 Watt Pack of 3 11182

  • Pack Of 3

25 Watt Marina Mini Submersible Aquarium Heater

  • 6-Inch, 25-Watt, Size: 25 Watt – 6 (Up To 5.5 Gal)

Tetra HT Aquarium Heater

  • 25 l 25 watt Tetra HT 50 25
  • 60 l 50 watt Tetra HT 75 60
  • 100 l 75 watt Tetra HT 100 100

Hidom Aquarium Heater 25W HT-2025 – Upgraded Specification

  • 25 W

Cascade 300 Watt Submersible Aquarium Heater – Penn-Plax

  • 300 Watt

Aqueon Submersible Heater

  • 100 Watt

Fluval P25 – 25W Submersible Aquarium Heater

  • 25 W

Aqueon Submersible Aquarium Heater

  • Precise temperature setting to 1-degree F (68-88 degrees F)
  • Recommended for aquariums up to 100-Gallons
  • Shatter-resistant construction, fully submersible

Aquael 75W Ultra Aquarium Heater

  • 75 W

Fluval Edge Compact Aquarium Heater (25 W)

  • Bring the sun indoors!
  • Includes avian sun 5.0 uvb lamp.
  • Adjustable gooseneck design.

Aquatop Titanium Aquarium Heater 400 Watt

  • 400 Watt

Hidom Aquarium Heater Quartz Glass Submersible Fish Tank – 25W Thermostat Control Pro-Heat HT 8025 – with Free Stick on Thermometer – Suitable for Bo

  • All heaters are fitted with UK 3-pin plug.
  • Precise & Reliable temperature control.
  • Fully submersible.
Marina Betta Fish Submersible Heater for Fish Tank Aquarium, 1.5 Gallons
  • 8-watt submersible fish tank heater for aquariums up to 1.5 gallons (5 L)
  • Creates ideal conditions for bettas to live in
  • Made of durable polymer, which is tougher than glass
Eccotemp EM-2.5 Electric 2.5 Gallon Mini Tank Water Heater
  • 2.5 Gallon
biOrb Heater Pack
  • Joint health supplement
  • Formulated with glucosamine and chondroitin
  • Most complete joint support supplement available
Fluval 'M' 50-Watt Submersible Heater
  • ‘m’ 50 W
Eheim GmbH Jager Aquarium Heater, 300 W
  • 300 W
Marina Betta Submersible Aquarium Heater
  • Creates ideal conditions for bettas to thrive in
  • Made of durable polymer, tougher than glass
  • Automatically reaches set temperature
Marina Betta Submersible Aquarium Heater 8 Watt Pack of 3 11182
  • Pack Of 3
25 Watt Marina Mini Submersible Aquarium Heater
  • 6-Inch, 25-Watt, Size: 25 Watt – 6 (Up To 5.5 Gal)
Tetra HT Aquarium Heater
  • 25 l 25 watt Tetra HT 50 25
  • 60 l 50 watt Tetra HT 75 60
  • 100 l 75 watt Tetra HT 100 100
Hidom Aquarium Heater 25W HT-2025 – Upgraded Specification
  • 25 W
Cascade 300 Watt Submersible Aquarium Heater – Penn-Plax
  • 300 Watt
Aqueon Submersible Heater
  • 100 Watt
Fluval P25 – 25W Submersible Aquarium Heater
  • 25 W
Aqueon Submersible Aquarium Heater
  • Precise temperature setting to 1-degree F (68-88 degrees F)
  • Recommended for aquariums up to 100-Gallons
  • Shatter-resistant construction, fully submersible
Aquael 75W Ultra Aquarium Heater
  • 75 W
Fluval Edge Compact Aquarium Heater (25 W)
  • Bring the sun indoors!
  • Includes avian sun 5.0 uvb lamp.
  • Adjustable gooseneck design.
Aquatop Titanium Aquarium Heater 400 Watt
  • 400 Watt
Hidom Aquarium Heater Quartz Glass Submersible Fish Tank – 25W Thermostat Control Pro-Heat HT 8025 – with Free Stick on Thermometer – Suitable for Bo
  • All heaters are fitted with UK 3-pin plug.
  • Precise & Reliable temperature control.
  • Fully submersible.

1. Marina Betta Fish Submersible Heater for Fish Tank Aquarium, 1.5 Gallons

Marina Betta Fish Submersible Heater for Fish Tank Aquarium, 1.5 Gallons

  • 8-watt submersible fish tank heater for aquariums up to 1.5 gallons (5 L)
  • Creates ideal conditions for bettas to live in
  • Made of durable polymer, which is tougher than glass
  • Easy to install in your betta fish tank; use the suction cups to place on the side of the betta tank
  • Automatically reaches set temperature; allowing you to easily maintain your fish aquarium

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Amazon.com

Product Details

Specifications

Details
Is Discontinued By Manufacturer No
Product Dimensions 1.7 x 5.3 x 7.1 inches; 6 Ounces
Item Package Dimensions L x W x H 7.05 x 5.08 x 2.99 inches
Item Dimensions LxWxH 1.7 x 5.3 x 7.1 inches
Target Audience Keyword Fish

Reviews From Real Customers

thackaringa
SirAhabMcCreamsicle
angelbecause2

2. Eccotemp EM-2.5 Electric 2.5 Gallon Mini Tank Water Heater

Eccotemp EM-2.5 Electric 2.5 Gallon Mini Tank Water Heater

  • 2.5 Gallon

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Amazon.com – Seller
eBay
Walmart
Home Depot

Product Details

Reviews From Real Customers

William R
adr1
Mistuh_D

3. biOrb Heater Pack

biOrb Heater Pack

  • Joint health supplement
  • Formulated with glucosamine and chondroitin
  • Most complete joint support supplement available

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Sold By Price
Amazon.com – Seller
eBay
Walmart – Pondliner
Aquatic Ponds

Product Details

Specifications

Details
Is Discontinued By Manufacturer No
Product Dimensions 8.85 x 3.75 x 3 inches; 3.2 Ounces
Item Package Dimensions L x W x H 9.8 x 3.8 x 2.9 inches
Item Dimensions LxWxH 8.85 x 3.75 x 3 inches
Target Audience Keyword Dogs, Fish
Directions As directed on packaging
Country of Origin United States
Age Range Description All ages
Included Components Biorb Tropical Heater Kit
Specific Uses for Product Active

Reviews From Real Customers

Cassie J.
stuart9621

4. Fluval ‘M’ 50-Watt Submersible Heater

Fluval 'M' 50-Watt Submersible Heater

  • ‘m’ 50 W

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Amazon.com
eBay
Walmart
PetSmart

Product Details

Specifications

Details
Is Discontinued By Manufacturer No
Country of Origin Italy
Item Package Dimensions L x W x H 14.68 x 4.8 x 1.65 inches
Item Dimensions LxWxH 1.8 x 4.8 x 14.8 inches
Age Range Description All ages

Reviews From Real Customers

police86
LisainNM
Fins feathers and fur

5. Eheim GmbH Jager Aquarium Heater, 300 W

Eheim GmbH Jager Aquarium Heater, 300 W

  • 300 W

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Amazon.com
eBay
PetSmart
Chewy.com

Product Details

Specifications

Details
Is Discontinued By Manufacturer No
Country of Origin USA
Item Package Dimensions L x W x H 23.23 x 6.06 x 2.99 inches
Item Dimensions LxWxH 1.42 x 19.92 inches
Target Audience Keyword Fish

Reviews From Real Customers

M.P.
ICReefer

6. Marina Betta Submersible Aquarium Heater

Marina Betta Submersible Aquarium Heater

  • Creates ideal conditions for bettas to thrive in
  • Made of durable polymer, tougher than glass
  • Automatically reaches set temperature
  • Easy to install using suction cups
  • For aquariums up to 5 litres (1.5 US Gal)

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Amazon
eBay
Walmart
Chewy.com

Product Details

Specifications

Details
Manufacturer Part Number 015561111829
Product Name Betta Submersible Heater
Product Type Aquarium Heater
Animal Type Fish
Animal Breed Betta

7. Marina Betta Submersible Aquarium Heater 8 Watt Pack of 3 11182

Marina Betta Submersible Aquarium Heater 8 Watt Pack of 3 11182

  • Pack Of 3

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Amazon
Walmart – iCapsi

Product Details

Specifications

Details
Animal Type Aquarium

8. Aquarium Mini Heater 25 W Sandimas

Aquarium Mini Heater 25 W Sandimas

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Amazon
Miscota.com

Product Details

Reviews From Real Customers

maskokotas.com
Soraya M

9. 25 Watt Marina Mini Submersible Aquarium Heater

25 Watt Marina Mini Submersible Aquarium Heater

  • 6-Inch, 25-Watt, Size: 25 Watt – 6 (Up To 5.5 Gal)

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Amazon
eBay
Walmart – Kens Fish Inc.
Pets Warehouse

Product Details

Specifications

Details
Manufacturer Part Number 015561112307
Product Name Submersible Aquarium Heater – Mini 25 W – 15 cm (6
Product Type Aquarium Heater
Animal Type Fish
Length 5.9″

Reviews From Real Customers

billyll
barrybhoy08
jim19826301

10. SunGrow Submersible Heater for Betta, Preset Temperature & Auto-Shutoff Functions, Creates Tropical Waters Native, Secure Suction Cups Hold Heater in

SunGrow Submersible Heater for Betta, Preset Temperature & Auto-Shutoff Functions, Creates Tropical Waters Native, Secure Suction Cups Hold Heater in

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Amazon
Walmart
Chewy.com

Product Details

Specifications

Details
Warranty 30 Day Warranty

Reviews From Real Customers

Watermelon
householdr2
Fishheater

11. Tetra HT Aquarium Heater

Tetra HT Aquarium Heater

  • 25 l 25 watt Tetra HT 50 25
  • 60 l 50 watt Tetra HT 75 60
  • 100 l 75 watt Tetra HT 100 100
  • 150 l 100 watt Tetra HT 150 150
  • 225 l 150 watt Tetra HT 200 225

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Amazon
eBay – animal-and-fish
Vivapets

Product Details

Reviews From Real Customers

greenpixie4

12. Hidom Aquarium Heater 25W HT-2025 – Upgraded Specification

Hidom Aquarium Heater 25W HT-2025 - Upgraded Specification

  • 25 W

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Amazon
eBay – finest-filters1
NxDeals.com

Product Details

Reviews From Real Customers

norman_lyons
blackswingrider55
griwis.hy1sywajf

13. Cascade 300 Watt Submersible Aquarium Heater – Penn-Plax

Cascade 300 Watt Submersible Aquarium Heater - Penn-Plax

  • 300 Watt

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Walmart
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Product Details

Specifications

Details
Fish Type All Fish Types
Maximum Tank Capacity 75 gal
Maximum Temperature 89 F
Minimum Tank Capacity 55 gal
Minimum Temperature 68 F

Reviews From Real Customers

brandytts
turtlebrat
Marvel

14. Aqueon Submersible Heater

Aqueon Submersible Heater

  • 100 Watt

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Amazon
eBay
Walmart – JBO Investments LLC
HorseLoverz Super Store

Product Details

Specifications

Details
Dimensions 1.5×12.3×3.8 inches

Reviews From Real Customers

dalton.f
Weiand
euphoniumism

15. Fluval P25 – 25W Submersible Aquarium Heater

Fluval P25 - 25W Submersible Aquarium Heater

  • 25 W

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Amazon
eBay
PetSmart
Miscota.com

Product Details

Specifications

Details
Primary Brand Fluval
Length 2.1 IN

Reviews From Real Customers

Michael En
LJMMD
johnnyringo1515

16. Aqueon Submersible Aquarium Heater

Aqueon Submersible Aquarium Heater

  • Precise temperature setting to 1-degree F (68-88 degrees F)
  • Recommended for aquariums up to 100-Gallons
  • Shatter-resistant construction, fully submersible
  • LED light turns on when aquarium water is being heated; Automatic safety shut off and overheat protection

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Amazon
eBay

Product Details

Reviews From Real Customers

corycatkeeper42
xidbobMoXoMdodbix
C M E

17. Aquael 75W Ultra Aquarium Heater

Aquael 75W Ultra Aquarium Heater

  • 75 W

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Amazon
eBay – saltwateraq
Walmart – Aquael USA
inTank

Product Details

Specifications

Details
Length 8.2″
Recommended tank size 16-26 gal
Power 75W

Reviews From Real Customers

sparkle_rm
youngal1952

18. Fluval Edge Compact Aquarium Heater (25 W)

Fluval Edge Compact Aquarium Heater (25 W)

  • Bring the sun indoors!
  • Includes avian sun 5.0 uvb lamp.
  • Adjustable gooseneck design.
  • Enhances reds and yellows.
  • Floating soft sticks are easy to digest.

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Amazon
Pets Warehouse

Product Details

Reviews From Real Customers

dreamlifter747
jamil.i
vinniec2804

19. Aquatop Titanium Aquarium Heater 400 Watt

Aquatop Titanium Aquarium Heater 400 Watt

  • 400 Watt

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Amazon
eBay
Walmart
PetMountain.com

Product Details

Specifications

Details
Is Discontinued By Manufacturer No
Product Dimensions 12 x 3 x 4 inches; 15.84 Ounces
Item Package Dimensions L x W x H 16.14 x 3.7 x 2.13 inches
Item Dimensions LxWxH 12 x 3 x 4 inches
Target Audience Keyword Fish

Reviews From Real Customers

Robert V.
ivtq2635

20. Hidom Aquarium Heater Quartz Glass Submersible Fish Tank – 25W Thermostat Control Pro-Heat HT 8025 – with Free Stick on Thermometer – Suitable for Bo

Hidom Aquarium Heater Quartz Glass Submersible Fish Tank - 25W Thermostat Control Pro-Heat HT 8025 - with Free Stick on Thermometer - Suitable for Bo

  • All heaters are fitted with UK 3-pin plug.
  • Precise & Reliable temperature control.
  • Fully submersible.
  • Ideal for Tropical / Marine or Freshwater.
  • Easy to set required temperature with temperature scale.

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bigamart.com

Product Details

Reviews From Real Customers

jteriem78_1
sadoldbiker
farchama_0

Conclusion

A heater for a 2.5 gallon betta tank should be able to maintain a water temperature of 78-80 degrees Fahrenheit.

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