Advertising Disclosure

5 Best Aquarium Thermometers of 2025

Last Updated - 2025/09/17

1
Best Choice

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Fluval

Fluval 2 in 1 Digital Aquarium Thermometer (11193)

Fluval

CA$24.91

More Details
Main highlights
- Wireless technology: no probes or messy wires Large LCD display simultaneously shows aquarium and ambient room temperatures
- Large, easy-to-read LCD display
- For fresh and saltwater aquariums
- 2-in-1: Measures water & room temperature accurately within 10C/20 F
- 0C / 0 F temperature selection
CA$24.91
2

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

VIVOSUN

VIVOSUN 3-Pack LCD Digital Aquarium Thermometer Fish Tank Water Terrarium Temperature with Suction Cup for Turtle

VIVOSUN

CA$19.99

More Details
Main highlights
- Two Suction Cups: Equipped with two suction cups, one for attaching the cable to the side of the tank and another for attaching the thermometer
- Super Long Gable: The cable length connected to the probe is 39.37 inch (1 m) superior to 23.62 inch (60 cm) standard cable length; Allows accurate temperature measurements in even the largest fish tanks
- LCD Display: Comes with a large LCD display that is easy to read clearly and accurately
- High Accuracy: Temperature Range: -50℃ ~ +70℃ (-58 °F ~ +158 °F); This aquarium thermometer is accurate to +/- 1℃, no matter whether the probe is placed in any corner of this fish tank, an accurate temperature will be displayed
- Adjustable Unit Temperature: Easy to adjust the temp between Fahrenheit and Celsius displays; Long-press the power button to adjust the unit display
CA$19.99
3

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

Zacro

Zacro LCD Digital Aquarium Thermometer Fish Tank Water Terrarium Temperature

Zacro

CA$8.99

More Details
Main highlights
- Temperature range -50 degree ~ + 70 degree,Operating temperature -10degree ~ +50 degree
- Submerge probe into fish tank to measure water temperature (Submerge probe only, do not submerge thermometer in water).
- Powered by one LR44 button cell (included)
- Large, easy to read LCD display. Compact design for discrete use.
- Easy to apply suction cup and easy to read LCD screen. Temperature readings to within 1 degree.
CA$8.99
4
Best Value

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

GODMISS

Smart Digital Fish Tank Thermometer – LED Display to ±0.9°F, Alarm for Aquarium, Turtle Tank, Betta Fish & More | 5-200 Gallon | High/Low Temperature Alerts

GODMISS

CA$11.99

CA$12.99
(7% Off)

More Details
Main highlights
- 𝐖𝐢𝐝𝐞 𝐂𝐨𝐦𝐩𝐚𝐭𝐢𝐛𝐢𝐥𝐢𝐭𝐲: Ideal for 5 gallon fish tank, 10 gallon fish tank, 20 gallon tank, large fish tanks (up to 200 gallons), and all aquarium accessories.
- 𝐏𝐫𝐞𝐜𝐢𝐬𝐢𝐨𝐧 𝐌𝐨𝐧𝐢𝐭𝐨𝐫𝐢𝐧𝐠:Keep your fish tank, aquarium, turtle tank, or shrimp tank at the perfect temperature with our accurate digital thermometer.
- 𝐏𝐞𝐚𝐜𝐞 𝐨𝐟 𝐌𝐢𝐧𝐝: Protect live fish, betta fish live, guppy fish, goldfish, and aquarium shrimp with reliable temperature gauge technology.
- 𝐄𝐚𝐬𝐲 𝐭𝐨 𝐔𝐬𝐞:Stick-on or submersible design works for freshwater fish tanks, saltwater aquariums, betta fish tanks, and aquatic turtle tanks.
- 𝐂𝐮𝐬𝐭𝐨𝐦 𝐀𝐥𝐞𝐫𝐭𝐬: Set high and low temperature limits; the thermometer for fish tank alerts you instantly if the water goes beyond your safe range.
CA$11.99
CA$12.99 (7% Off)
5

✖
Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant’s customer service level, popularity, trends and more. The rankings reflect our opinion and should be a good starting point for shopping.

JLENOVEG

Fish Tank Digital Thermometer Digital Aquarium Thermometer LED Display Stick-on Fish Tank Thermometer Default HI/LO Alarm Cordless Tank Temperature Sensor with LED Touch Screen

JLENOVEG

CA$11.99

More Details
Main highlights
- Touch Screen Energy Saving Mode and Cordless Tank Thermometer: Stick-on Thermometer with backside temperature sensor check fish tank temperature. Touch the button to display the current temperature. After 10 seconds the fish tank thermometer will automatically enter sleep state, energy saving mode, just touch it again when needed
- Stylish Design with Alarm Function: The battery cover is designed with non-removable screws, which makes it easy to replace the battery subsequently and protects children from touching the battery. High and low temperature alarm function to remind attention to water temperature changes (default high temperature 34 degrees Celsius, low temperature 15 degrees Celsius), when the temperature exceeds the range value, the screen will flash to remind.
- High Accurate Display with Long Battery Life: The alarm tank thermometer has a reading range of 14-140°F(-10—60℃) and is accurate to 1°F. Aquarium thermometer built-in CR2032 button battery, which can be used for 24 months (depending on the usage).
- HD LED Display Digital Aquarium Thermometer: HD LED display, temperature is clearly visible. LED display provide wide viewing angle of up to 120° with good color saturation, easy to read the data no matter day or night. Mini aquarium thermometer will not block your sight of the temperature.
- Easy to use: Fish Thank Thermometer No installation tools needed. Just take out the battery spacer, then peel off the hook and loop (not tape), which can be removed and glued back together. Convenient to replace the battery in the future. And stick it on the fish tank for use. Long press the touch button to change C/F, choose the right by yourself
CA$11.99

5 Best Aquarium Thermometers of 2025

Fluval 2 in 1 Digital Aquarium Thermometer (11193)

VIVOSUN 3-Pack LCD Digital Aquarium Thermometer Fish Tank Water Terrarium Temperature with Suction Cup for Turtle

Zacro LCD Digital Aquarium Thermometer Fish Tank Water Terrarium Temperature

Smart Digital Fish Tank Thermometer – LED Display to ±0.9°F, Alarm for Aquarium, Turtle Tank, Betta Fish & More | 5-200 Gallon | High/Low Temperature Alerts

Fish Tank Digital Thermometer Digital Aquarium Thermometer LED Display Stick-on Fish Tank Thermometer Default HI/LO Alarm Cordless Tank Temperature Sensor with LED Touch Screen

You may also like...

KeeKit Digital Aquarium Thermometer, LED Fish Tank Thermometer with Touch Screen, Measurement Range is 0℃~60℃, Premium Stick-on Thermometer, Suitable for Fish Turtle Reptile

EEEKit Aquarium Thermometer Digital, Wireless Fish Tank Thermometer with Accurate Temperature Sensor for Turtle Reptiles

GuDoQi Aquarium Thermometer, 2Pack Rechargeable Fish Tank Thermometer, LED Touch Display, ℉/℃ Switchable, Accurate Stick-on Tank Temperature Sensor Idea for Aquariums, Glass Containers

KeeKit Digital Aquarium Thermometer - Touch Screen Fish Tank Thermometer with Large LED Display, Stick-on for Terrariums, Accurate Sensor for Freshwater & Saltwater, ℃/℉ Switchable

DWEII 4Pack Aquarium Thermometer, Reptile Thermometer, Fish Tank Thermometer, Digital Thermometer, Terrarium Water Temperature Test, with Large LCD Display

Marina Deluxe Floating Thermometer with Suction Cup, Beige

NEPTONION Aquarium Thermometer LCD Digital Aquarium Thermometer Fish Tank Water Terrarium Temperature for fish and reptiles like Lizard and Turtle

Rechargeable Digital Aquarium Water Thermometer with Touch LED Screen Display ±0.1°C, Fish Tank Decoration Accessories for Betta Axolotl Shrimp Turtle Reptile and Aquatic

Marina Floating Thermometer with Suction Cup

ULTECHNOVO Temperature Strip Sticker - Aquarium Thermometer Stick on - Fish Tank Digital Thermometer, 18-34 Degree Range (10pcs)

Sign up and get exclusive special deals