we’ve put together a collection of the best Aquarium Thermometers that are currently available on the market. To help you find the perfect Aquarium Thermometer among a wide variety of options, we constantly update our collection with new and trending models.

10 Best Aquarium Thermometers

Based on dozens of customer reviews and ratings, the followings are the top 10 best-selling Aquarium Thermometers:

# Preview Product Price
1 Zacro LCD Digital Aquarium Thermometer Fish Tank Water Terrarium Temperature Zacro LCD Digital Aquarium Thermometer Fish Tank Water Terrarium Temperature $8.99 View Product
2 JW Pet Company Smarttemp Thermometer Aquarium Accessory JW Pet Company Smarttemp Thermometer Aquarium Accessory $8.35 View Product
3 PENN-PLAX Therma-Temp Floating Aquarium Thermometer – Mercury Free – Safe for Freshwater and Saltwater Fish PENN-PLAX Therma-Temp Floating Aquarium Thermometer – Mercury Free – Safe for Freshwater and… $9.87 View Product
4 Zacro Pack of 2 LCD Digital Aquarium Thermometer Fish Tank Water Terrarium Temperature Zacro Pack of 2 LCD Digital Aquarium Thermometer Fish Tank Water Terrarium Temperature $10.99 View Product
5 Marina Standing Thermometer, Fahrenheit and Celsius Aquarium Thermometer, 11202 Marina Standing Thermometer, Fahrenheit and Celsius Aquarium Thermometer, 11202 $2.99 View Product
6 capetsma Fish Tank Thermometer, Touch Screen Digital Aquarium Thermometer with LCD Display, Stick-on Temperature Sensor ensures Optimum Temperature in Terrarium, for Your pet Amphibians and Reptiles… capetsma Fish Tank Thermometer, Touch Screen Digital Aquarium Thermometer with LCD Display, Stick-on… $18.99 View Product
7 LCR Hallcrest A-1005 Liquid Crystal Vertical Aquarium Thermometer LCR Hallcrest A-1005 Liquid Crystal Vertical Aquarium Thermometer $4.80 View Product
8 AQUANEAT 1 Pack Aquarium Thermometer, Reptile Thermometer, Fish Tank Thermometer, Digital Thermometer, Terrarium Water Temperature Test, with Large LCD Display AQUANEAT 1 Pack Aquarium Thermometer, Reptile Thermometer, Fish Tank Thermometer, Digital… $7.99 View Product
9 Marina Deluxe Floating Thermometer with Suction Cup Marina Deluxe Floating Thermometer with Suction Cup $7.69 View Product
10 2-Pack Aquarium Thermometer, Fish Tank Thermometer, AikTryee Water Thermometer with LCD Display Fahrenheit/Celsius(℉/℃) for Vehicle Reptile Terrarium Fish Tank Refrigerator. 2-Pack Aquarium Thermometer, Fish Tank Thermometer, AikTryee Water Thermometer with LCD Display… $7.98 View Product

Top Rated Aquarium Thermometer Reviews

Since we’ve mentioned 10 different models of Aquarium Thermometers on the above list, it may be difficult for you to find the right one for your needs. This is why we listed the key features of each of these Aquarium Thermometers below:

1

Zacro LCD Digital Aquarium Thermometer Fish Tank Water Terrarium Temperature
Zacro LCD Digital Aquarium Thermometer Fish Tank Water Terrarium Temperature

$8.99
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Product Highlights:

  • Submerge probe into fish tank to measure water temperature (Submerge probe only, do not submerge thermometer in water)
  • Easy to apply suction cup and easy to read LCD screen; Temperature readings to within 0.1 degree
  • Large, easy to read LCD display. Compact design for discrete use
  • Temperature range -50 degree Celsius~ + 70 degree Celsius; Operating temperature -10degree Celsius~ +50degree Celsius
  • Powered by one LR44 button cell (included)
2

JW Pet Company Smarttemp Thermometer Aquarium Accessory
JW Pet Company Smarttemp Thermometer Aquarium Accessory

$8.35
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Product Highlights:

  • 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
Sale3

PENN-PLAX Therma-Temp Floating Aquarium Thermometer – Mercury Free – Safe for Freshwater and Saltwater Fish
PENN-PLAX Therma-Temp Floating Aquarium Thermometer – Mercury Free – Safe for Freshwater and Saltwater Fish

$9.87
View Product
Product Highlights:

  • DESIGNED TO FLOAT IN AQUARIUMS: Our Floating Aquarium Thermometers are mercury free, and are designed for a quick, easy, and reliable temperature readings. They’re safe to use inside both freshwater and saltwater fish tanks.
  • OPTIONAL SUCTION CUP: Each Floating Aquarium Thermometer comes with an optional suction cup, which allows you to place it alongside the tank’s walls for even easier access for a temperature reading. The suction cup mount is removable, and the thermometer should float on its own.
  • PLEASE NOTE: Please place the thermometer vertically inside your fish tank. This allows the colored liquid to pool at the bottom, and give an accurate temperature reading. Some settling may have occurred during the delivery process, but the interior liquid will return to the bulb once it’s set into a vertical position.
  • MEASUREMENTS: Overall = 0.5” (W) x 0.8” (D) x 4.25” (H) / Suction Cup = 0.8” (Dia)
  • SHOP PENN-PLAX FOR ALL YOUR PET’S NEEDS: PENN-PLAX is a manufacturer and distributor of top quality pet supplies, who specialize in creating excellent pet products for animals, both great and small.
4

Zacro Pack of 2 LCD Digital Aquarium Thermometer Fish Tank Water Terrarium Temperature
Zacro Pack of 2 LCD Digital Aquarium Thermometer Fish Tank Water Terrarium Temperature

$10.99
View Product
Product Highlights:

  • Submerge probe into fish tank to measure water temperature (Submerge probe only, do not submerge thermometer in water).
  • Easy to apply suction cup and easy to read lcd screen; temperature readings to within 1 degree
  • Large, easy to read lcd display; compact design for discrete use
  • Temperature range -50 degree Celsius ~ + 70 degree Celsius; Operating temperature -10 degree Celsius ~ +50 degree Celsius.
  • Powered by one lr44 button cell (included)
5

Marina Standing Thermometer, Fahrenheit and Celsius Aquarium Thermometer, 11202
Marina Standing Thermometer, Fahrenheit and Celsius Aquarium Thermometer, 11202

$2.99
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Product Highlights:

  • Fish tank thermometer designed to sink to the bottom
  • Remains standing in a vertical position
  • Accurate and easy-to-read thermometer
  • Provides readings in Fahrenheit and Celsius
  • Includes safety zone indicator appropriate for most tropical fish
6

capetsma Fish Tank Thermometer, Touch Screen Digital Aquarium Thermometer with LCD Display, Stick-on Temperature Sensor ensures Optimum Temperature in Terrarium, for Your pet Amphibians and Reptiles…
capetsma Fish Tank Thermometer, Touch Screen Digital Aquarium Thermometer with LCD Display, Stick-on Temperature Sensor ensures Optimum Temperature in Terrarium, for Your pet Amphibians and Reptiles…

$18.99
View Product
Product Highlights:

  • 🎈 No Probes or Messy Wires in water : backside temperature sensor stick on the outside glass of the fish tank prevent water infiltration and electronic Oxidation, Classic Red+Black compact design with Large Crystal Touch Screen makes it easier to read the temperature far away, stands out among other Fish Tank thermometers.
  • 🎈 Large numbers on 3.2″ Large Transparent Screen : 3.2″ large glass screen is larger than most of the thermometers, large temperature display on transparent screen, will not block your view.
  • 🎈 Accurate Display : With an accurate temperature sensor stick on the surface of the fish tank, this Digital aquarium thermometer will display accurate temperature for fish tank, reading from 0°C to 70°C / 32°F – 158°F, accurate to 0.1°
  • 🎈 Easy to Operate: pull down the red battery cover below the screen, insert battery, close it, stick on and read the tank temperature. press up or down to switch °C / °F
  • 🎈 Widely used: Suitable For Different Water Types Such As Fresh Water, Tap Water, Salty Water, Marine Water And Monitors The Living Temperature For Reptile Such As Lizard, Turtle.Also, it can be used for DIY Brew Beer and wine barrel, Terrarium, Greenhouse, Vivarium pet tank thermometer.
7

LCR Hallcrest A-1005 Liquid Crystal Vertical Aquarium Thermometer
LCR Hallcrest A-1005 Liquid Crystal Vertical Aquarium Thermometer

$4.80
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Product Highlights:

  • Easy To Read
  • Mounts Vertically On The Outside Of Your Aquarium
  • Easily Movable
  • Country of Origin: CHINA
8

AQUANEAT 1 Pack Aquarium Thermometer, Reptile Thermometer, Fish Tank Thermometer, Digital Thermometer, Terrarium Water Temperature Test, with Large LCD Display
AQUANEAT 1 Pack Aquarium Thermometer, Reptile Thermometer, Fish Tank Thermometer, Digital Thermometer, Terrarium Water Temperature Test, with Large LCD Display

$7.99
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Product Highlights:

  • Wide application: Ideal for use in water or high moisture environment like aquarium terrarium, or vivarium; suitable for different water types such as fresh water, tap water, salty water, marine water and etc.
  • Easy to read: Comes with a large LCD display that is easy to read clearly
  • Easy to setup: Submerge probe with suction cup can easily be set in water (Submerge probe only, do not submerge thermometer in water) ; Press ”PWR” for 3 seconds to power off
  • Free extra LR44: 2 PCS LR44 button cell for each thermometer (one for operation, one for spare)
  • Wide temperature range: Measure -58°F to +158°F (-50°C to +70°C) with accuracy +/- 1°C
9

Marina Deluxe Floating Thermometer with Suction Cup
Marina Deluxe Floating Thermometer with Suction Cup

$7.69
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Product Highlights:

  • Easy-to-read floating thermometer
  • Includes a safety zone indicator
  • Equipped with suction cups
  • Ensures your aquarium is at a proper temperature
  • Temperature range of 30 to 120 degrees Fahrenheit
10

2-Pack Aquarium Thermometer, Fish Tank Thermometer, AikTryee Water Thermometer with LCD Display Fahrenheit/Celsius(℉/℃) for Vehicle Reptile Terrarium Fish Tank Refrigerator.
2-Pack Aquarium Thermometer, Fish Tank Thermometer, AikTryee Water Thermometer with LCD Display Fahrenheit/Celsius(℉/℃) for Vehicle Reptile Terrarium Fish Tank Refrigerator.

$7.98
View Product
Product Highlights:

  • 【WIDE TEMPERATURE TEST】Fish Tank Thermometer Temperature Range -58℉ ~ +158℉; Temperature measurement accuracy: ±1℉; It can be used in temperature sensing of many types of liquids, making your temperature measurement so simple.
  • 【PRODUCT MATERIAL】Aquarium Thermometer uses a high-precision stainless steel sensor probe to measure the water temperature of the aquarium. The main unit uses a professional LCD display to solve the problem of not knowing the temperature of the fish tank, thus providing a healthy and comfortable water environment for all kinds of fish.
  • 【LARGE SCREEN DISPLAY】Digital Aquarium Thermometer with a Large Screen 1.6 inch LCD Display, Easy to Read Temperature for Children or Older People, Real-time monitoring of changes in water temperature.
  • 【LONG BATTERY LIFE】Water Thermometer Powered by LR44 Button Cell (Included), Battery Working Time up to 8 Months.
  • 【Package Includes】Aquarium Thermometer 2 x Digital Aquarium Thermometer; 2*LR44 battery（Included）; Gift: 2*LR44 spare battery; 4 x Suction cup mounts.

Video Overview

The WORST Thermometer for your Aquarium – DO NOT BUY

Looking at the worst aquarium thermometer money can buy. But I also show you my favorite thermometer for my fish tanks. And it’s not what you think it is.

Final Words

So, these are all of the Best Aquarium Thermometers available on the market. We hope this collection was helpful to find the right Aquarium Thermometer for the money. However, we recommend checking out the features, benefits, and problems of each of these Aquarium Thermometers before taking your decision.