Editor's Choice - Our Favorite Digital Aquarium Thermometers

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

User Ratings: 74 3

Zacro FBA_ZDT1-AUX-1 First Impressions

"I like this."

I have kept aquariums for about 45 years. For something so cheap, they are working remarkably well. So the extra units will always come in handy. One of my aquariums is glass, and the other two are plastic. It works equally well on all of them. Personally I do not mind the way it looks in my aquarium. My only complaint is that they tend to be a one time use.

  • Zacro LCD Digital Aquarium Thermometer Fish Tank Water Terrarium Temperature
  • Small volume, large function: The size of thermometer is 2.17 x 1.46 in. Our thermometer is suitable for different water types such as fresh water, tap water, salty water, marine water and etc.
  • Convenient: You can choose seither Fahrenheit or Celsius according to your need. What's more, each thermometer is equipped with a LR44 battery.
  • Show clearly temperature: You can read the temperature data clearly in the LCD screen. Please note that the thermometer reading has about 1 degree deviation.
  • Easy to use: Submerge probe into fish tank to measure water temperature (Submerge probe only, do not submerge thermometer in water).
  • Temperature range: -50 degree Celsius~ + 70 degree Celsius; Operating temperature: -10 degree Celsius~ +50 degree Celsius.
  • Manufacture: Zacro
  • Editor's Impressions Of The Zacro FBA_ZDT1-AUX-1
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

Zacro FBA_ZDT1-AUX-1 Final Thoughts

"7 reading."

The lid is textured aluminum, and the suction cups don't stick to that. This company is taking the long term view of how to do business right. 2 deg, if it was 32, it would be a SOLID block of ice. I recommend gluing the suction cups in place where needed for long-term installation. Now I'm getting back in on a much smaller scale with 3 gallon Acrylic Nano tanks. For the price I'll probably end up putting these in all of my aquariums. All were Close enough for a fish tank and other uses.

Overall Score
4.5


(4472 Points)

Peoples Choice - Other Highly Rated Digital Aquarium Thermometers

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

User Ratings: 73 2

Zacro ZDT1D-AUX-1 First Impressions

"Great product!"

89 I could buy Six Thermometers with Six included batteries. He was moving slow in the winter and we realized he needed a heater! And I just really started to doubt it. Instead she sent a new package of two, both of which work. SIX Digital Thermometers with SIX batteries INCLUDED working so well. A bit large for anything smaller than 5 gallons, but that's to be expected. Ordered three of these and they do the job.

  • Zacro Pack of 2 LCD Digital Aquarium Thermometer Fish Tank Water Terrarium Temperature
  • 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)
  • Manufacture: Zacro
  • Product Dimensions: 7.1 x 4.3 x 2 inches; 2.08 Ounces
  • Editor's Impressions Of The Zacro ZDT1D-AUX-1
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

Zacro ZDT1D-AUX-1 Final Thoughts

"Changed to 5-stars now."

The extra batteries where very much appreciated and came in handy. All are pretty accurate within one degree as claimed. For the price I'll probably end up putting these in all of my aquariums. One being a very expensive digital. This company is taking the long term view of how to do business right. The digital display itself is easy to read at a glance. I just wrote it off as a minor loss.

Overall Score
4.6


(3558 Points)

3. Zoo Med Digital Terrarium Thermometer, 3 x 2 x 1"

User Ratings: 72 4

Zoo Med TH24 First Impressions

"A solid five stars."

So versatile, I can read the temperatures literally anywhere. At least in the first 3 months of use. You can not swivle the thermometer to face a certain way. I have this thermometer on all my tanks. For something so cheap, they are working remarkably well. This is my first 5 star review out of many many reviews on Amazon. I recommend gluing the suction cups in place where needed for long-term installation.

  • Zoo Med Digital Terrarium Thermometer, 3 x 2 x 1"
  • External sensor can go in water
  • Fahrenheit and Celsius
  • LCD readout
  • Using suction cups, mount the probe inside the enclosure (wet or dry). Mount the digital display in a dry location outside the enclosure.
  • Press power (pwr) button to turn on. Press and hold power button for 5 seconds to turn off.
  • Slide fahrenheit/celsius switch to desired setting.
  • Uses one LR44, 1.5 v battery (included).
  • Manufacture: Zoo Med Laboratories
  • Item Weight: 1.06 ounces
  • Product Dimensions: 6 x 4 x 2 inches
  • Batteries: 1 LR44 batteries required. (included)
  • Editor's Impressions Of The Zoo Med TH24
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

Zoo Med TH24 Final Thoughts

"I placed it on the side."

I find that the temps are accurate, and this product gives added peace of mind. So much so that I purchased a second set of 6. Now I'm getting back in on a much smaller scale with 3 gallon Acrylic Nano tanks. This thermometer is spot on accurate. Very accurate, have checked it with other thermometers as well. So this is the extreme end of the high temperature range. When I set up my newest tank I will be getting another one of these.

Overall Score
4.5


(1749 Points)

4. Aquarium Thermometer, Digital Fish Tank Thermometer with Large LCD Display Touch Screen, Stick-on Ta...

User Ratings: 75 4

capetsma First Impressions

"They are within 0."

I have always had trouble reading the color temp. These digital thermometers are great and there is no guesswork involved. Sure enough the digital thermometer was way off by 6 degrees! Good cheap accurate aquarium thermometer. Was going to get a floater until I saw this magnetic one! It will make you wonder why nobody thought of it before. You can not swivle the thermometer to face a certain way.

  • Aquarium Thermometer, Digital Fish Tank Thermometer with Large LCD Display Touch Screen, Stick-on Tank Temperature Sensor Ensures Accurate Reading for Aquarium Terrarium Amphibians & Reptiles
  • Cordless & Touch Screen Design : no probes or messy wires in water and backside temperature sensor stick on the outside glass of the fish tank prevent water infiltration and electronic Oxidation, Large Crystal Touch Screen makes it easier to read the temperature far away, stands out among other aquarium 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 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 black battery cover below the screen, insert the battery, close it, stick 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 and any sort of pet tank thermometer.
  • Manufacture: capetsma
  • Product Dimensions: 2.99 x 0.28 x 2.99 inches; 3.21 Ounces
  • Batteries: 2 CR2 batteries required. (included)
  • Editor's Impressions Of The capetsma
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

capetsma Final Thoughts

"These are great!"

So, in those cases, I find it easier to simply replace it. I was using one of those ubiquitous cheap digital thermometers on Amazon. Ambient room temperature measures 72. I guess these units do not like saltwater. The extra batteries where very much appreciated and came in handy. I have it in both my aquariums now. I was using one of those ubiquitous cheap digital thermometers on Amazon.

Overall Score
4.5


(1678 Points)

Honorable Mentions - More Top Selling Digital Aquarium Thermometers

5. Neptonion Aquarium Thermometer LCD Digital Aquarium Thermometer with Suction Cup Fish Tank Water Ter...

User Ratings: 72 5

Neptonion First Impressions

"Buy these."

So far I've been very thrilled with these. Then she followed up again on that, asking if they had arrived and were okay. Only thing I don't love is how long the cord is. It is easy to use and install it'disappears' in your tank it is so unobtrusive. It is large enough to see without being obtrusive. I don't think i'll ever be able to trust a digital thermometer again. It started working as soon as I put it in and has been working ever since.

  • Neptonion Aquarium Thermometer LCD Digital Aquarium Thermometer with Suction Cup Fish Tank Water Terrarium Temperature for Fish and Reptiles Like Lizard and Turtle
  • - Easy to read : With compact design ,The Large LCD display unit is easy to read.
  • - °F / ℃ : It records a wide range of temperature (can be read in Celsius or Fahrenheit), which makes it exceptionally useful in that you can use it in any kind of fish tank.
  • ⏰ - Precise : Displaying temperature measurements within 0.1 degrees! And has a temperature range from -50 to +70 degrees celsius.
  • - Easy to set up : This thermometer comes with two parts that have suction cups that simplify the mounting process.
  • - Durable : it’s powered by one LR44 battery. These are very long lasting and easy to replace. Making this a great choice if you’re looking for an accurate and durable thermometer.
  • Manufacture: Windbells
  • Batteries: 1 LR44 batteries required. (included)
  • Editor's Impressions Of The Neptonion
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

Neptonion Final Thoughts

"Fast accurate readings."

Put them all in the same tank and they read very close to each other. The suction will never be the same. Instead she sent a new package of two, both of which work. You can not swivle the thermometer to face a certain way. I have kept aquariums for about 45 years. Only thing I don't love is how long the cord is. I've checked it against two other thermometers that are accurate.

Overall Score
4.4


(1325 Points)

6. Aquarium Thermometer, 2 PCS AikTryee Fish Tank Thermometer, Reptile Thermometer, Terrarium Temperatu...

User Ratings: 54 11

AikTryee First Impressions

"It is within."

These things are useful for a lot besides pet husbandry, too. It started working as soon as I put it in and has been working ever since. When and if we run out of this batch, I'll instantly order another batch. The suction cups work well anywhere I have placed it it has not Fallen. I'm pretty sure those reviewers have acrylic tanks. Since it is a mercury thermometer, it is very accurate. Then is started to give a low reading, and it is not reading the correct temperature.

  • Aquarium Thermometer, 2 PCS AikTryee Fish Tank Thermometer, Reptile Thermometer, Terrarium Temperature Meters Gauge, LCD Display ( ℉) for Vehicle Reptile Terrarium Fish Tank Refrigerator
  • 【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.
  • 【WIDE TEMPERATURE TEST】Temperature Range -58 ℉ ~ +230℉; Temperature measurement accuracy: ±2℉; It can be used in temperature sensing of many types of liquids, making your temperature measurement so simple.
  • 【LONG BATTERY LIFE】Powered by Two LR44 Button Cell (Included), Battery Working Time up to 8 Months. No more hesitation! Try it now!
  • 【Package Includes】Package Included; 2 x Aquarium thermometer; 4 x LR44 button cell battery; 2 x Double-sided tape; 1 x Standard color package.
  • Manufacture: AikTryee
  • Product Dimensions: 1.89 x 1.14 x 0.62 inches; 2.4 Ounces
  • Batteries: 2 LR44 batteries required. (included)
  • Editor's Impressions Of The AikTryee
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

AikTryee Final Thoughts

"No issues."

I find that the temps are accurate, and this product gives added peace of mind. And I just really started to doubt it. 6 in a pack, extra batteries, easy set up, great price. This doesn't bother me as it ws so cheap. Instead she sent a new package of two, both of which work. I just wrote it off as a minor loss. He was moving slow in the winter and we realized he needed a heater!

Overall Score
4.0


(1208 Points)

7. VIVOSUN 1-Pack LCD Digital Aquarium Thermometer Fish Tank Water Terrarium Temperature with Suction C...

User Ratings: 73 3

VIVOSUN First Impressions

"Fish and me happy."

The display can be set to Fahrenheit or Celsius. I have kept aquariums for about 45 years. The plastic from the suction cup quickly turned from a clear to a milky white. My poor fish was in 86 degrees water for a month. Very accurate, have checked it with other thermometers as well. I was using one of those ubiquitous cheap digital thermometers on Amazon. Put them all in the same tank and they read very close to each other.

  • VIVOSUN 1-Pack LCD Digital Aquarium Thermometer Fish Tank Water Terrarium Temperature with Suction Cup for Turtle
  • 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
  • LCD DISPLAY: Comes with a large LCD display that is easy to read clearly and accurately
  • ADJUSTABLE UNIT TEMPERATURE: Easy to adjust the temp between Fahrenheit and Celsius displays; Long-press the power button to adjust the unit display
  • 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 CABLE: The cable length connected to the probe is 78.74 inch (2 m) superior to 23.62 inch (60 cm) standard cable length; Allows accurate temperature measurements in even the largest fish tanks
  • 1. Open the battery cover on the back of this thermometer and insert the button battery to ensure the “+” positive electrode is face up;
  • 2. Use one suction cup to attach the back of this thermometer, then fix this unit to the outer of this fish tank, another suction cup is for attaching the cable;
  • 3. Submerge the probe attached cable into the fish tank;
  • Manufacture: VIVOSUN
  • Editor's Impressions Of The VIVOSUN
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

VIVOSUN Final Thoughts

"So we are ordering more."

He was moving slow in the winter and we realized he needed a heater! Who knows, whatever it was, it was revolting! I removed the batteries of the units I wasn't using right away. I used to have a large hang in the side tank that you couldn't miss. 49 thermometer that is 100% accurate. At least in the first 3 months of use. The temperature fluctuated a lot with it.

Overall Score
4.6


(1062 Points)

8. Juwel Digital Aquarium Thermometer

User Ratings: 59 12

Juwel JU85702NET First Impressions

"Would buy again."

I find that the temps are accurate, and this product gives added peace of mind. Still a recommendation for me due to price and accuracy. Works well in my betta tank, but provide a couple hours for it to read temp changes. Simple fix, you adjust the thermometer within the suction cup and VIOLA! I needed a solution that was not breakable and these do the trick! I tested this in a cup crammed full of ice and some water. Ambient room temperature measures 72.

  • Juwel Digital Aquarium Thermometer
  • Wipe clean
  • The Juwel Digital Thermometer 2.0 has a large, easy-to-read digital display so you can easily keep an eye on the temperature in your aquarium.
  • Batteries included.
  • Manufacture: Juwel
  • Product Dimensions: 0.39 x 0.39 x 0.39 inches; 1.34 Ounces
  • Batteries: 1 LR44 batteries required. (included)
  • Editor's Impressions Of The Juwel JU85702NET
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

Juwel JU85702NET Final Thoughts

"This is perfect."

I got the second one as a bonus that I'm now using in my old tank. Have checked them against the glass thermometers and the accuracy is right on. 50 thermometers, reads much easier and no suction cup residue, also looks better. So much so that I purchased a second set of 6. Far more accurate than the usual small glass ones or external LCD strips. All are pretty accurate within one degree as claimed. Personally I do not mind the way it looks in my aquarium.

Overall Score
4.0


(1017 Points)

9. Fluval Edge Digital Aquarium Thermometer

User Ratings: 68 6

Fluval 11206 First Impressions

"Suction cups are okay."

I've checked it against two other thermometers that are accurate. 6 inch long Bala Sharks that are known to be very unruly and boisterous. Works well in my betta tank, but provide a couple hours for it to read temp changes. When and if we run out of this batch, I'll instantly order another batch. You dont HAVE to stick the display onto your tank. Instead she sent a new package of two, both of which work. This company is taking the long term view of how to do business right.

  • 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
  • Age range description: All ranges
  • Manufacture: Fluval
  • Product Dimensions: 0.2 x 2.9 x 7 inches; 0.16 Ounces
  • Editor's Impressions Of The Fluval 11206
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

Fluval 11206 Final Thoughts

"2-degrees."

I just wrote it off as a minor loss. My poor fish was in 86 degrees water for a month. Then is started to give a low reading, and it is not reading the correct temperature. Now that the chickens are grown, I have one out in the coop as well. 6F all six took about three minutes to read between 88. I've checked it against two other thermometers that are accurate. All were Close enough for a fish tank and other uses.

Overall Score
4.3


(948 Points)

10. Leegoal Digital Aquarium Terrarium Fish Tank Thermometer(Black)

User Ratings: 64 11

Leegoal 046280 First Impressions

"Suction cups fail."

I am extremely pleased with this product. I don't think i'll ever be able to trust a digital thermometer again. I can't say which is the most accurate and don't really care. I came here to give this product a positive review. Love it, it's easy to read and keeps an accurate temp. These digital thermometers are great and there is no guesswork involved. I used to have a large hang in the side tank that you couldn't miss.

  • Leegoal Digital Aquarium Terrarium Fish Tank Thermometer(Black)
  • Digital Thermometer with external thermistor with 3 ft insulated wire.
  • easy to read LCD display Compact design, with suction cup and place to any smooth surface use Flip to switch between ¡ãC and ¡ãF On/Off button to save battery power.
  • Simple operation Submerge probe/thermistor into fish tank or a refrigerator or any place you want to monitor the temperature.
  • Manufacture: TOOGOO(R)
  • Editor's Impressions Of The Leegoal 046280
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

Leegoal 046280 Final Thoughts

"So far so good."

For something so cheap, they are working remarkably well. I can't say which is the most accurate and don't really care. This temperature read a perfect 32 degrees. The suction will never be the same. This doesn't bother me as it ws so cheap. So, in those cases, I find it easier to simply replace it. Only thing I don't love is how long the cord is.

Overall Score
4.1


(669 Points)

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