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20 Best Thermometer For Aquarium (2022 Updated)

Aquarium thermometers are devices used to measure the water temperature in an aquarium. There are many different types of aquarium thermometers on the market, including digital thermometers, glass thermometers, and stick-on thermometers.

It is important to choose the right type of thermometer for your aquarium, as different aquariums have different temperature needs.

20 Best Thermometer For Aquarium

Product Image Product Name Features Price

Fluval 2 in 1 Digital Thermometer

  • 2-in-1: Measures water & room temperature accurately within 1-2c.
  • Wireless technology: no probes or messy wires Large LCD display simultaneously shows aquarium and ambient room temperatures.

JW Fusion Smart Temp Aquarium Thermometer

  • In-tank thermometer is secured with magnet outside the tank
  • No suction cups needed
  • Green safe zone indicates optimal temperature range

Coralife Digital Thermometer for Aquariums

  • Ideal for terrarium temperature monitoring.
  • Easy-to-read LCD displays temperature in Fahrenheit or Celsius.
  • Replaceable battery included.

Fluval Edge Digital Aquarium Thermometer

  • Accurate and easy-to-read thermometer
  • Mounts easily on outside of glass
  • Ideal for fresh and saltwater tanks

Zoo Med Digital Terrarium Thermometer

  • 1 Count

JBJ DT2 Digital Temperature External Thermometer with Probe Aquarium

  • Round the clock temperature display
  • Mounting suction cups and battery included; long temperature probe cord
  • Amazingly compact and lightweight

Marina Meridian Thermometer

  • Easy-to-read LCD display
  • Reliably accurate to plus-or-minus 1° F
  • Mounts easily to outside of any aquarium

JW Pet Standard Thermometer

  • This unique design combines a thermometer with a magnet.
  • The Thermometer goes on the inside of the tank and the magnet goes on the outside to hold the SmartTemp firmly in place, no suction cups needed!

Image GlassTube Thermometer with Suction Cups – 0.03 lb

  • Glass Thermometer from Imagitarium
  • Measures water temperature in Celsius and Fahrenheit
  • Attaches to the inside of your aquarium with the included suction cup

Oase Digital Thermometer

  • Button allows convenient switching between Fahrenheit and Celsius readings
  • Sleek, compact design won’t disrupt from the beauty of your aquarium

Exo Terra Liquid Crystal Thermometer

  • Helps maintain proper temperature level as the temperature is a crucial factor in keeping your reptiles or amphibians healthy and stress free.

Imagitarium Aquarium Strip Thermometer

  • Aquarium Strip Thermometer from Imagitarium
  • Adheres to the outside of glass or acrylic fish tanks for an easy and secure instillation

Marina Dolphin Thermometer

  • 1 Count

Marina Dorado Thermometer

  • Accurate and easy to read aquarium thermometer
  • Mounts easily on outside glass
  • Reads temperature range from 66 to 88° F

Underwater Treasures Floating Glass Thermometer

  • Easy to read
  • Fully submersible
  • Displays temperature in F and C

JBL Aquarium Thermometer DigiScan, 27 G

  • Easy to read digital thermometer that sticks to the glass on the outside of the aquarium.
  • The thermometer is supplied with a Velcro strip to allow easy installation and removal.

ADA Na Thermometer J – Celsius Version 12mm

  • 12 mm
Fluval 2 in 1 Digital Thermometer
  • 2-in-1: Measures water & room temperature accurately within 1-2c.
  • Wireless technology: no probes or messy wires Large LCD display simultaneously shows aquarium and ambient room temperatures.
JW Fusion Smart Temp Aquarium Thermometer
  • In-tank thermometer is secured with magnet outside the tank
  • No suction cups needed
  • Green safe zone indicates optimal temperature range
Coralife Digital Thermometer for Aquariums
  • Ideal for terrarium temperature monitoring.
  • Easy-to-read LCD displays temperature in Fahrenheit or Celsius.
  • Replaceable battery included.
Fluval Edge Digital Aquarium Thermometer
  • Accurate and easy-to-read thermometer
  • Mounts easily on outside of glass
  • Ideal for fresh and saltwater tanks
Zoo Med Digital Terrarium Thermometer
  • 1 Count
JBJ DT2 Digital Temperature External Thermometer with Probe Aquarium
  • Round the clock temperature display
  • Mounting suction cups and battery included; long temperature probe cord
  • Amazingly compact and lightweight
Marina Meridian Thermometer
  • Easy-to-read LCD display
  • Reliably accurate to plus-or-minus 1° F
  • Mounts easily to outside of any aquarium
JW Pet Standard Thermometer
  • This unique design combines a thermometer with a magnet.
  • The Thermometer goes on the inside of the tank and the magnet goes on the outside to hold the SmartTemp firmly in place, no suction cups needed!
Image GlassTube Thermometer with Suction Cups – 0.03 lb
  • Glass Thermometer from Imagitarium
  • Measures water temperature in Celsius and Fahrenheit
  • Attaches to the inside of your aquarium with the included suction cup
Oase Digital Thermometer
  • Button allows convenient switching between Fahrenheit and Celsius readings
  • Sleek, compact design won’t disrupt from the beauty of your aquarium
Exo Terra Liquid Crystal Thermometer
  • Helps maintain proper temperature level as the temperature is a crucial factor in keeping your reptiles or amphibians healthy and stress free.
Imagitarium Aquarium Strip Thermometer
  • Aquarium Strip Thermometer from Imagitarium
  • Adheres to the outside of glass or acrylic fish tanks for an easy and secure instillation
Marina Dolphin Thermometer
  • 1 Count
Marina Dorado Thermometer
  • Accurate and easy to read aquarium thermometer
  • Mounts easily on outside glass
  • Reads temperature range from 66 to 88° F
Underwater Treasures Floating Glass Thermometer
  • Easy to read
  • Fully submersible
  • Displays temperature in F and C
JBL Aquarium Thermometer DigiScan, 27 G
  • Easy to read digital thermometer that sticks to the glass on the outside of the aquarium.
  • The thermometer is supplied with a Velcro strip to allow easy installation and removal.
ADA Na Thermometer J – Celsius Version 12mm
  • 12 mm

1. Fluval 2 in 1 Digital Thermometer

Fluval 2 in 1 Digital Thermometer

  • 2-in-1: Measures water & room temperature accurately within 1-2c.
  • Wireless technology: no probes or messy wires Large LCD display simultaneously shows aquarium and ambient room temperatures.
  • 0C / 0 F temperature selection.
  • Large, easy-to-read LCD Display.
  • For fresh and saltwater aquariums.

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Amazon.com
eBay
Walmart – Kens Fish Inc.
Miscota.com

Product Details

Specifications

Details
Manufacturer Part Number 015561111935
Product Name 2-in-1 Digital Aquarium Thermometer
Product Type Aquarium Thermometer
Compatibility Fresh and Salt Water Aquariums

Reviews From Real Customers

a-kempinski-2007
Thomas U
nelly155415541554

2. JW Fusion Smart Temp Aquarium Thermometer

JW Fusion Smart Temp Aquarium Thermometer

  • In-tank thermometer is secured with magnet outside the tank
  • No suction cups needed
  • Green safe zone indicates optimal temperature range
  • Large easy to read numbers

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Amazon.com – Seller
Walmart
Pets on Broadway
PetMountain.com

Product Details

Specifications

Details
Is Discontinued By Manufacturer No
Product Dimensions 4 x 7 x 0.5 inches; 1.12 Ounces
Country of Origin USA
Item Package Dimensions L x W x H 6.5 x 3.5 x 0.4 inches
Item Dimensions LxWxH 4 x 7 x 0.5 inches

Reviews From Real Customers

Darlene
SCN1

3. Coralife Digital Thermometer for Aquariums

Coralife Digital Thermometer for Aquariums

  • Ideal for terrarium temperature monitoring.
  • Easy-to-read LCD displays temperature in Fahrenheit or Celsius.
  • Replaceable battery included.

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Amazon
eBay
Walmart
PetMountain.com

Product Details

Specifications

Details
Weight 0.5 lb

Reviews From Real Customers

saltwateraquarium.com
Aditya

4. Fluval Edge Digital Aquarium Thermometer

Fluval Edge Digital Aquarium Thermometer

  • Accurate and easy-to-read thermometer
  • Mounts easily on outside of glass
  • Ideal for fresh and saltwater tanks
  • Temperature range of 64 to 86 degrees Fahrenheit

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Amazon
Pets Warehouse
bigamart.com

Product Details

Specifications

Details
Assembled Product Weight 0.05 oz

Reviews From Real Customers

johdugga_0
grahambc
Reviewed by Maidenhead Aquatics customer

5. Zoo Med Digital Terrarium Thermometer

Zoo Med Digital Terrarium Thermometer

  • 1 Count

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Amazon
PetSmart
Chewy.com
Petco.com

Product Details

Specifications

Details
Weight 0.05 lb

6. JBJ DT2 Digital Temperature External Thermometer with Probe Aquarium

JBJ DT2 Digital Temperature External Thermometer with Probe Aquarium

  • Round the clock temperature display
  • Mounting suction cups and battery included; long temperature probe cord
  • Amazingly compact and lightweight
  • Item Package Weight: 0.5

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Amazon
Walmart
petocart.com
Lax Aquarium

Product Details

Reviews From Real Customers

Ravens
jason

7. Marina Meridian Thermometer

Marina Meridian Thermometer

  • Easy-to-read LCD display
  • Reliably accurate to plus-or-minus 1° F
  • Mounts easily to outside of any aquarium

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Amazon
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Walmart
PetMountain.com

Product Details

Specifications

Details
Manufacturer Part Number 015561112222
Product Name LCD Aquarium Thermometer – Centigrade – Fahrenheit – 18 to 30° C (64 to 86° F)
Product Type Aquarium Thermometer
Animal Type Fish
Length 1.8″

Reviews From Real Customers

bobon_2078
Morgann
molly

8. JW Pet Standard Thermometer

JW Pet Standard Thermometer

  • This unique design combines a thermometer with a magnet.
  • The Thermometer goes on the inside of the tank and the magnet goes on the outside to hold the SmartTemp firmly in place, no suction cups needed!
  • The SmartTemp also offers a Green Safe Zone which indicates the optimal temperature range.
  • A High-End Accuracy- (+/-) 1.5 °F and large easy to read numbers.

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Sold By Price
Amazon
eBay – dealsonweels4you
Walmart – Little Family Members
Petmate

Product Details

Specifications

Details
Animal Type Multi-Colored
Assembled Product Weight 0 oz

Reviews From Real Customers

OldSchoolTech
Noctivagant

9. Image GlassTube Thermometer with Suction Cups – 0.03 lb

Image GlassTube Thermometer with Suction Cups - 0.03 lb

  • Glass Thermometer from Imagitarium
  • Measures water temperature in Celsius and Fahrenheit
  • Attaches to the inside of your aquarium with the included suction cup
  • Safety zone indicator monitors ideal temperatures for most tropical fish
  • Safe for freshwater and saltwater environments

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Amazon
Petco.com
Instacart

Product Details

Reviews From Real Customers

Lissy10
MaKaOlHa
Bctint

10. Oase Digital Thermometer

Oase Digital Thermometer

  • Button allows convenient switching between Fahrenheit and Celsius readings
  • Sleek, compact design won’t disrupt from the beauty of your aquarium
  • Easily change out the battery without removing the thermometer
  • Includes one LR1130 battery

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Amazon
eBay
Walmart
PetSmart

Product Details

Specifications

Details
Top Quality Products Trusted name brands
Best Value Selling at best possible price
Net Weight 0.1 lbs.

Reviews From Real Customers

paulf957
cyprus4eva
barryw714

11. Exo Terra Liquid Crystal Thermometer

Exo Terra Liquid Crystal Thermometer

  • Helps maintain proper temperature level as the temperature is a crucial factor in keeping your reptiles or amphibians healthy and stress free.
  • Easy to read and install.
  • Can be placed inside or outside the terrarium.

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Amazon
eBay
Walmart
Miscota.com

Product Details

Specifications

Details
Animal Type Reptile
Assembled Product Weight 0.023 oz
Assembled Product Dimensions (L x W x H) 0.20 x 3.30 x 7.20 Inches

12. Imagitarium Aquarium Strip Thermometer

Imagitarium Aquarium Strip Thermometer

  • Aquarium Strip Thermometer from Imagitarium
  • Adheres to the outside of glass or acrylic fish tanks for an easy and secure instillation
  • Measures in Celsius and Fahrenheit
  • Uses easy-to-read measurements
  • Ideal for freshwater or saltwater fish tanks

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Amazon
Petco.com

Product Details

Reviews From Real Customers

Mr S
starguy

13. JW Fusion Smart Temp Aquarium Thermometer Aquarium Thermometer Pack of 3

JW Fusion Smart Temp Aquarium Thermometer Aquarium Thermometer Pack of 3

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Amazon
Walmart – iCapsi

Product Details

14. Marina Dolphin Thermometer

Marina Dolphin Thermometer

  • 1 Count

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eBay
Walmart
Miscota.com
PetMountain.com

Product Details

Specifications

Details
Weight 0.02 lb

Reviews From Real Customers

snydsterjohn
sco-micha
falco1000

15. Marina Dorado Thermometer

Marina Dorado Thermometer

  • Accurate and easy to read aquarium thermometer
  • Mounts easily on outside glass
  • Reads temperature range from 66 to 88° F
  • Aquarium Thermometer Length 3″L x 1″W

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eBay
Walmart
PetMountain.com
Petproducts.com

Product Details

Specifications

Details
Weight 0.02 lb

16. Underwater Treasures Floating Glass Thermometer

Underwater Treasures Floating Glass Thermometer

  • Easy to read
  • Fully submersible
  • Displays temperature in F and C
  • Suitable for freshwater and marine aquariums

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eBay
Modern Aquarium

Product Details

Specifications

Details
Dimensions 6.9 x 3.2 x 0.75 inches
Aquarium Type Freshwater, Saltwater

Reviews From Real Customers

Sanford
Lesley F.
Gary S.

17. ADA Glass Hang-On NA Thermometer, Celsius – Aqua Design Amano – 5mm

ADA Glass Hang-On NA Thermometer, Celsius - Aqua Design Amano - 5mm

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Aqua Forest Aquarium

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David Q
Lindsay W.
Emad

18. JBL Aquarium Thermometer DigiScan, 27 G

JBL Aquarium Thermometer DigiScan, 27 G

  • Easy to read digital thermometer that sticks to the glass on the outside of the aquarium.
  • The thermometer is supplied with a Velcro strip to allow easy installation and removal.
  • The see through screen allows for an unobtrusive view of your aquarium whilst still providing a clear display of temperature reading.

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bigamart.com

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Specifications

Details
dimensions 6.5 x 2 x 5 cm; 27 Grams

Reviews From Real Customers

alain
aqua-store.fr
Frydrychowicz

19. ADA Na Thermometer J – Celsius Version 12mm

ADA Na Thermometer J - Celsius Version 12mm

  • 12 mm

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Aqua Forest Aquarium

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aquaforestaquarium.com

20. Marina Dolphin Thermometer Thermometer (68-86 F)

Marina Dolphin Thermometer Thermometer (68-86 F)

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petocart.com

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cawraith-2009

Conclusion

A thermometer is a device used to measure temperature. There are many different types of thermometers, but the most common type used for measuring the temperature of an aquarium is an electronic thermometer.

An electronic thermometer usually has a probe that is placed in the water. The probe is connected to a display unit that shows the current water temperature. Many electronic thermometers also have an alarm that will sound if the water temperature gets too high or too low.

Thermometers are an important part of keeping an aquarium because the temperature of the water has a big impact on the health of the fish. If the water is too cold, the fish can get sick and die. If the water is too hot, the fish can also get sick and die.

It is important to check the temperature of the water in an aquarium regularly with a thermometer to make sure that it is within the safe range for the fish.

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