7 Best Aquarium Digital Thermometers

The temperature in your aquarium is very important for keeping certain fish like tropical fish such as guppies. A digital thermometer will give you a real time visual display of the current temperature in your aquarium.

Best Aquarium Digital Thermometer

In this article I am going to show you my 7 best rated aquarium digital thermometers, I am going to review everyone and let you know the pros and cons of each one.

After the reviews I have written a guide which will teach you what you need to look for when selecting a digital thermometer for your aquarium.

Comparison of 7 Best Aquarium Digital Thermometers

Below is a quick look at my 7 best recommended aquarium digital thermometers.  If you wish to see a more detailed review of any of the thermometers below click on “Read My Review”

#1 – Zacro LCD Digital Thermometer

Zacro LCD Digital Thermometer

  • Temperature Range : -50 to +70F
  • Display : Large LCD
  • Water Type : Salt and Freshwater
  • Thermometer size : 2.17 x 1.46 inches
  • Probe Cable Length : 24.88 inches
  • Suction Cup : Yes
  • Overall Rating : 9 / 10
  • Read My Review

#2 – Jcreate Aquarium Thermometer

jcreate Aquarium Thermometer

  • Temperature Range : -50 to +70F
  • Display : Extra Large LCD
  • Water Type : Salt and Freshwater
  • Product Size : 76*76*7mm / 3.0*3.0*0.28 inch
  • Probe  : No Probe Needed
  • Colour : Black or Red
  • Rating : 9 / 10

#3 – Keynice Digital Thermometer

Keynice Digital Thermometer

  • Temperature Range : -58 to +230F
  • Display : Colour LCD
  • Water Type : Salt and Freshwater
  • Product Size : 4.2 x 1.6 x 1.6 inches
  • Power : Via USB Connection
  • Rating : 8.8 / 10

#4 – Fluval Celcius Digital Aquarium Thermometer

JEDEW Aquarium Thermometer

  • Temperature Range : -58 to +230F
  • Display : 1.6 inch LCD Display
  • Water Type : Salt and Freshwater
  • Product Size : 48*28*15mm
  • Probe Cable Length : 1 Meter
  • Rating : 8.7 / 10

#5 – Zoo Med Digital Thermometer

Zoo Med Digital Thermometer

  • Temperature Range : -50 to +70F
  • Display : Large LCD
  • Water Type : Salt and Freshwater
  • Thermometer size : 2.17 x 1.46 inches
  • Probe Cable Length : 24.88 inches
  • Suction Cup : Yes
  • Rating : 8.8 / 10

#6 – Lifegard Aquatics Digital Temp Alert

Lifegard Aquatics Digital Temp Alert

  • Temperature Range : -50 to +70F
  • Display : Extra Large LCD
  • Water Type : Salt and Freshwater
  • Product size : 6 x 1.2 x 8.2 inches
  • Power : AAA Battery
  • Suction Cup : No, Stand Included
  • Rating : 9 / 10

#7 – Capetsma Aquarium Thermometer

Capetsma Aquarium Thermometer

  • Temperature Range : -50 to +70F
  • Display : Large LCD
  • Water Type : Salt and Freshwater
  • Thermometer size : 2.17 x 1.46 inches
  • Probe Cable Length : 24.88 inches
  • Suction Cup : Yes
  • Rating : 8.8 / 10

Best Aquarium Digital Thermometers Reviews

I will now go in to more detail to let you know what I like and what I don’t like about all of the thermometers in this review.

   Zacro LCD Digital Thermometer Review

Zacro LCD Digital Thermometer Rated #1 Digital Thermometer By HelpUsFish

This is a great little thermometer which has a nice big easy to read display and comes with two suction cups which help to hold the thermometer in place.

I have been using this product in my 60 gallon tank and I can say it reads the water temperature very accurately. I have been using this for five months and have had no issues with it, I highly recommend this product.

Features: 

  • Clear To Read LCD Display
  • Submersible Probe
  • Easy to Apply Suction Cup
  • Temperature Output in C + F
  • Thermometer size: 2.17 x 1.46 inches
  • Cable length: 24.88 inches
Package Contents:

  • 1 x Battery
  • 1 x Digital Thermometer
  • 1 x Probe
PRO’SCON’S
  • Easy To Setup and Use
  • Will Last For a Long Time
  • Accurate Temperature Readings
  • Very Cheap To Buy
  • No Alarm

  Jcreate Aquarium Thermometer Review

jcreate Aquarium Thermometer Rated #2 Digital Thermometer
Rated #1 Probe-Less Digital Thermometer

This thermometer really surprised me. You stick it on the outside of your tank. It has a backside temperature sensor. I thought this will not measure the water temperature accuracy!  Oh how I was wrong, it is very accurate at measuring the temperature.

I love the large LED display making it easy for you to read the temperature.

Operation:

  1. We already inserted battery in the red battery cover below the LCD Screen ,the LCD will now display the current temperature.
  2. Tear off the paper, stick this device on to a transparent tinted background.
  3. If you want to switch ℃ / °F, click ”up“or “down“ key on the screen.
  4. There is a flash function, The big number will flash if the water temperature is higher than the highest temperature or lower than the lowest temperature you set.

Features: 

  • Clear To Read LCD Display
  • Stick-on Outside of Tank
  • Easy to Apply Suction Cup
  • Temperature Output C + F
  • Thermometer size: 76*76*7mm / 3.0*3.0*0.28 inch
Package Contents:

  • 2 x CR2032 Battery
  • 1 x Digital Aquarium Thermometer
PRO’SCON’S
  • Easy To Setup and Use
  • Will Last For a Long Time
  • Accurate Temperature Readings
  • Highly Rated On Amazon
  • No Alarm
  • Have To Remove To Clean Tank Glass

  Keynice Digital Thermometer Review

Keynice Digital Thermometer Rated #3 Digital Thermometer

This is a great little thermometer which has a nice big easy to read display.

Again in my tests this measured the temperature of my aquarium water very accurately.

Can display the temperature in C or F, you have to remove a jumper at the back of the device to swap.

The only thing I do not like about this unit is that you need to connect the USB cable to a PC or power socket.

Features: 

  • Clear To Read LCD Display
  • Stick-on Outside of Tank
  • USB Power Source
  • Temperature Output C + F
  • Thermometer size: 4.2 x 1.6 x 1.6 inches
Package Contents:

  • 1 x Digital Aquarium Thermometer
  • 1 x USB Cable
  • 1 X Sensor Cable
PRO’SCON’S
  • Easy To Setup and Use
  • Accurate Temperature Readings
  • Displays Temperature In C + F
  • USB powered, no batteries
  • No Alarm
  • Personally I Did Not Like The Display As Much As The Other Products

  Fluval Celcius Digital Aquarium Thermometer Review

JEDEW Aquarium Thermometer Rated #4 Digital Thermometer
Rated #1 Budget Digital Thermometer

This is by far the cheapest product on my list, currently it is selling for $4.99 on Amazon.

It might not have as many features as other thermometers such as only displays the temperature in fahrenheit, Doesn’t have an alarm, Basic looking display.

Having said that it does exactly what you want and it does it well.  The tests that I did it measured my aquarium water very accurately, Was very easy to setup and use and has currently lasted 5 months with no issues.

I highly recommend this product if you are looking not to spend a lot of money.

Features: 

  • Large LCD Display
  • Stick-on Outside of Tank
  • Internal Battery Powered
  • Temperature Output F
Package Contents:

  • 1 x Digital Aquarium Thermometer
  • 1 x Suction Cup Mount
  • 1 x Sensor Cable
  • 2 x LR44 Button Cell Batteries
PRO’SCON’S
  • Easy To Setup and Use
  • Accurate Temperature Readings
  • Cheap To Buy
  • Comes With Spare Batteries
  • No Alarm
  • Only Displays Temperature In F

  Zoo Med Digital Thermometer Review

Zoo Med Digital Thermometer Rated #5 Digital Thermometer
Rated #2 Budget Digital Thermometer

This is the second cheapest product on my list, currently it is selling for $5.49 on Amazon.

This is a great thermometer which has a nice big easy to read display and comes with two suction cups which help to hold the thermometer and probe in place.

In my tests it reads the water temperature very accurately. I have been using this for five months and have had no issues with it, I highly recommend this product.

Features: 

  • LCD Display
  • Measures Temperature Accurately
  • Internal Battery Powered
  • Temperature Output C + F
Package Contents:

  • 1 x Digital Aquarium Thermometer
  • 1 x Suction Cup Mount
  • 1 x Sensor Cable
PRO’SCON’S
  • Easy To Setup and Use
  • Accurate Temperature Readings
  • Cheap To Buy
  • Temperature Output C + F
  • No Alarm

  Lifegard Aquatics Digital Temp Alert Review

Lifegard Aquatics Digital Temp Alert Rated #6 Digital Thermometer
Rated #1 Expensive Digital Thermometer

I for me this is the best product I have reviewed. The only reason why I did not rate this as #1 is because of its price. Currently it is selling for $42.52 on Amazon.

This product has a lot more features than the others which include an alarm if the water temperature goes below or above what you set.

It also displays two temperatures, the room temperature and the water temperature. It also uses a AAA battery which I like as this is a higher capacity battery compared to the other products.

This product also comes with a stand or sticky back which enables you to easily place it on your aquarium tank.

Features: 

  • Large LCD Display
  • Displays Room + Water Temperature
  • Measures Temperature Accurately
  • Internal AAA Battery Powered
  • Temperature Output C + F
  • Low Water Temperature Alarm
  • High Water Temperature Alarm
Package Contents:

  • 1 x Digital Aquarium Thermometer
  • 1 x Suction Cup Mount With Probe Cable
  • 1 x AAA Battery
PRO’SCON’S
  • Easy To Setup and Use
  • Displays Room + Water Temperature
  • Low Water Temperature Alarm
  • High Water Temperature Alarm
  • Accurate Temperature Readings
  • Temperature Output C + F
  • Expensive To Buy

  Capetsma Aquarium Thermometer Review

Capetsma Aquarium Thermometer Rated #7 Digital Thermometer
Rated #1 Digital Thermometer With Alarm

This product has no wires / probe, you attach it directly on to the outside of the glass in your aquarium.

It also has an alarm if the water temperature goes below or above what you set.

In my tests the water temperature reading were out by 1 fahrenheit,  I don’t believe this to be a big issue.

It also does not come with any batteries, You will need

Features: 

  • Large LCD Display
  • Displays Room + Water Temperature
  • Measures Temperature Accurately
  • Internal AAA Battery Powered
  • Temperature Output C + F
  • Low Water Temperature Alarm
  • High Water Temperature Alarm
Package Contents:

  • 1 x Digital Aquarium Thermometer
  • 1 x Suction Cup Mount With Probe Cable
  • 1 x AAA Battery
PRO’SCON’S
  • Easy To Setup and Use
  • Displays Room + Water Temperature
  • Low Water Temperature Alarm
  • High Water Temperature Alarm
  • Accurate Temperature Readings
  • Temperature Output C + F
  • Expensive To Buy

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