Editor's Choice - Our Favorite Qooltek Aquarium Thermometers

1. Qooltek Mini Hygrometer Thermometer LCD Display Digital Temperature Humidity Meter Gauge for Incubat...

User Ratings: 67 6

Qooltek First Impressions

"2-degrees."

The only reason I didn't give this 5 stars is because my betta fish didn't like it. I used these to raise chicks, and in my parrot cages. Only thing I don't love is how long the cord is. I got the second one as a bonus that I'm now using in my old tank. Simple fix, you adjust the thermometer within the suction cup and VIOLA! I read some of the 1 star reviews and most of them are not about the product. The plastic from the suction cup quickly turned from a clear to a milky white.

  • Qooltek Mini Hygrometer Thermometer LCD Display Digital Temperature Humidity Meter Gauge for Incubators Reptile and Humidors (Fahrenheit)
  • Mini Digital LCD Display Hygrometer Thermometer
  • Temperature Range: -40°F ~ 140°F ; Temperature Display Resolution: 1°F
  • Measuring Humidity Range: 10% RH ~ 99% RH
  • Humidity Accuracy:5%; Humidity Display Resolution: 1% RH
  • Degree Fahrenheit (F) Display Only, Temperature and humidity display the same size of figures.
  • Manufacture: Qooltek
  • Part Number: 004-00651
  • Item Weight: 0.705 ounces
  • Product Dimensions: 1.89 x 0.59 x 1.1 inches
  • Color: Black
  • Batteries: 2 LR44 batteries required.
  • Power Source: Battery Powered
  • Batteries Included?: No
  • Batteries Required?: No
  • Editor's Impressions Of The Qooltek
  • Thermometer Accuracy [star rating='3.5']
  • Quality [star rating='4.9']
  • Value For Money [star rating='4.9']
  • Affordability [star rating='4.1']

Qooltek Final Thoughts

"2 degrees of each other."

The lid is textured aluminum, and the suction cups don't stick to that. Ambient room temperature measures 72. Only thing I don't love is how long the cord is. So, in those cases, I find it easier to simply replace it. 82 PER THERMOMETER with battery included. I used to have a large hang in the side tank that you couldn't miss. I have this thermometer on all my tanks.

Overall Score
4.3

[star rating="4.3"]
(447 Points)

Peoples Choice - Other Highly Rated Qooltek Aquarium Thermometers

2. Qooltek Digital LCD Thermometer Temperature Gauge Aquarium Thermometer with Probe for Vehicle Reptil...

User Ratings: 69 5

Qooltek First Impressions

"They all were within."

The lid is textured aluminum, and the suction cups don't stick to that. Only thing I don't love is how long the cord is. Simple fix, you adjust the thermometer within the suction cup and VIOLA! I have mine on my 60 gallon cube marine tank. You can not swivle the thermometer to face a certain way. I recommend gluing the suction cups in place where needed for long-term installation. So versatile, I can read the temperatures literally anywhere.

  • Qooltek Digital LCD Thermometer Temperature Gauge Aquarium Thermometer with Probe for Vehicle Reptile Terrarium Fish Tank Refrigerator(Fahrenheit)
  • Remote wired probe can read temperature up to 3.3 feet away
  • Temperature range: -58°F~ +199°F
  • Designed to be embedded or can be surface mounted
  • Battery Operated (included) (Aprox 2 year battery life)Size 1"x1.75"
  • Mounting Hole Size 1"x 1.75" (0.5" deep).
  • Manufacture: Qooltek
  • Part Number: 050-004
  • Material: Plastic + LCD
  • Item Weight: 0.81 ounces
  • Product Dimensions: 1.18 x 0.59 x 1.97 inches
  • Color: Black
  • Batteries: 2 LR44 batteries required. (included)
  • Power Source: Battery Powered
  • Batteries Included?: Yes
  • Batteries Required?: Yes
  • Editor's Impressions Of The Qooltek
  • Thermometer Accuracy [star rating='4.1']
  • Quality [star rating='3.9']
  • Value For Money [star rating='4.5']
  • Affordability [star rating='5']

Qooltek Final Thoughts

"So we are ordering more."

6 inch long Bala Sharks that are known to be very unruly and boisterous. This is how you calibrate a thermometer. So far, they're all doing their job in my four tanks and I am quite content. This company is taking the long term view of how to do business right. All were Close enough for a fish tank and other uses. In this scenario it would probably get knocked loose a lot. I recommend gluing the suction cups in place where needed for long-term installation.

Overall Score
4.4

[star rating="4.4"]
(371 Points)

3. Qooltek Mini Digital Hygrometer Thermometer Indoor Humidity Monitor with Temperature Humidity Gauge ...

User Ratings: 65 6

Qooltek BFBA-0009 First Impressions

"Great little thermometer."

I removed the batteries of the units I wasn't using right away. Works well in my betta tank, but provide a couple hours for it to read temp changes. 6F all six took about three minutes to read between 88. All are pretty accurate within one degree as claimed. When I set up my newest tank I will be getting another one of these. My poor fish was in 86 degrees water for a month. Was going to get a floater until I saw this magnetic one!

  • Qooltek Mini Digital Hygrometer Thermometer Indoor Humidity Monitor with Temperature Humidity Gauge Meter for Cars Incubators and Brooders Climb Pet (Fahrenheit)
  • Mini Digital LCD Thermometer Humidity Temperature.
  • Temperature Range: -40°F ~ 140°F
  • Measuring Humidity Range: 10% RH ~ 95% RH
  • Humidity Accuracy:5% ; Humidity Display Resolution: 1% RH
  • Mini size perfect to use in incubators, brooders, cigar humidors,reptile tank. If you do not like the small temperature display, you can consider the new hygrometer thermometer - ASIN B079JB3YYL
  • Manufacture: Qooltek
  • Part Number: 050-029
  • Material: Metal
  • Item Weight: 0.705 ounces
  • Product Dimensions: 1.18 x 0.59 x 1.97 inches
  • Color: Black
  • Batteries: 2 LR44 batteries required. (included)
  • Power Source: Battery Powered
  • Batteries Included?: Yes
  • Batteries Required?: Yes
  • Editor's Impressions Of The Qooltek BFBA-0009
  • Thermometer Accuracy [star rating='4.9']
  • Quality [star rating='4']
  • Value For Money [star rating='4']
  • Affordability [star rating='4.2']

Qooltek BFBA-0009 Final Thoughts

"Suction cups fail."

And for the price you cant beat it. I have mine on my 60 gallon cube marine tank. This temperature read a perfect 32 degrees. This thermometer is spot on accurate. These things are useful for a lot besides pet husbandry, too. Ordered three of these and they do the job. I'm pretty sure those reviewers have acrylic tanks.

Overall Score
4.3

[star rating="4.3"]
(357 Points)

4. Zoo Med Digital Aquatic Turtle Thermometer (2 Pack)

User Ratings: 41 29

Zoo Med TH26 First Impressions

"I like these."

This temperature read a perfect 32 degrees. I have this thermometer on all my tanks. 89 I could buy Six Thermometers with Six included batteries. The non-working ones still provide 2 batteries each AND. The digital display itself is easy to read at a glance. A bit large for anything smaller than 5 gallons, but that's to be expected. I used these to raise chicks, and in my parrot cages.

  • Zoo Med Digital Aquatic Turtle Thermometer (2 Pack)
  • Replacement Battery Included
  • Fully submersible
  • Fahrenheit Scale
  • Manufacture: Zoo Med Laboratories
  • Product Dimensions: 4 x 1 x 4 inches; 3.2 Ounces
  • Editor's Impressions Of The Zoo Med TH26
  • Thermometer Accuracy [star rating='2.5']
  • Quality [star rating='3.6']
  • Value For Money [star rating='2.7']
  • Affordability [star rating='3.4']

Zoo Med TH26 Final Thoughts

"Works perfect."

I don't think they are backlit but for the price they are still nice. The digital display is nice and small as well. I got root rot after light leaks and high water temps. I have it in both my aquariums now. 89 I could buy Six Thermometers with Six included batteries. When and if we run out of this batch, I'll instantly order another batch. One extra battery came with each unit.

Overall Score
3.3

[star rating="3.3"]
(45 Points)

5. Petyoung 2-in-1 Digital LCD Embedded Thermometer Hygrometer Temperature Monitor with External Probe ...

User Ratings: 50

Petyoung 1330990/120337AM16UK2AQW First Impressions

"Love this product!"

I can't say which is the most accurate and don't really care. So this is the extreme end of the high temperature range. However, Lucy at Zacro read this review and emailed me. The suction will never be the same. Since it is a mercury thermometer, it is very accurate. Since it is a mercury thermometer, it is very accurate. I find that the temps are accurate, and this product gives added peace of mind.

  • Petyoung 2-in-1 Digital LCD Embedded Thermometer Hygrometer Temperature Monitor with External Probe Reptile Incubator Aquarium Poultry
  • 1. Mini thermometer hygrometer, allows you easily and fast to know the environment temperature and humidity.
  • 2. It can measure the humidity in the range of 10%-99%, and temperature from -50℃ to 70℃ precisely, offering a comfortable living surrounding for your pet or reptiles.
  • 3. Integrated the thermometer and hygrometer in one meter, convenient to use.
  • 4. LCD digital screen displays the number clearly for easy reading.
  • 5. Perfect to use in incubators, brooders, cigar room, reptile tank, aquarium, fish tank and other places where you want.
  • Manufacture: Petyoung
  • Product Dimensions: 4.72 x 2.36 x 1.18 inches; 1.41 Ounces
  • Editor's Impressions Of The Petyoung 1330990/120337AM16UK2AQW
  • Thermometer Accuracy [star rating='5']
  • Quality [star rating='5']
  • Value For Money [star rating='5']
  • Affordability [star rating='4.1']

Petyoung 1330990/120337AM16UK2AQW Final Thoughts

"I like the product."

However, Lucy at Zacro read this review and emailed me. I bought these for my dwc reservoirs. In the right situation this magnet thermometer is the best available. It is easy to use and install it'disappears' in your tank it is so unobtrusive. Now I'm getting back in on a much smaller scale with 3 gallon Acrylic Nano tanks. Only thing I don't love is how long the cord is. The digital display is nice and small as well.

Overall Score
4.5

[star rating="4.5"]
(2 Points)

6. Waterproof Digital Instant Read Food and Meat Thermometer for Kitchen, Outdoor Cooking, BBQ, and Gri...

User Ratings: 53 9

star sound source First Impressions

"Would buy again."

Good cheap accurate aquarium thermometer. When I set up my newest tank I will be getting another one of these. I'm pretty sure those reviewers have acrylic tanks. I came here to give this product a positive review. 6 in a pack, extra batteries, easy set up, great price. Excellent working for our bearded dragon tank. You can glue, tape or simply cover the cords in the tank to keep them discreet.

  • Waterproof Digital Instant Read Food and Meat Thermometer for Kitchen, Outdoor Cooking, BBQ, and Grill with Fahrenheit and Celsius can be converted (BBQ TP)
  • Instant Reading of The Thermometer is Quick: the instant reading thermometer uses a food grade stainless steel probe sensor to obtain accurate temperature readings, oF / oC can be switched.
  • Free Switching Between Celsius and Fahrenheit: Celsius temperature range -50°C~300°C; Fahrenheit temperature range of -58°F~572°F to ±1°C, suitable for indoor and outdoor cooking, barbecue, barbecue, etc.
  • Waterproof Rating is IP67: The thermometer can be cleaned under running water without worry! Rugged ABS plastic body for accidental drops or other crashes
  • Easy to Use: Sensitive probe, easy to use, precise temperature measurement, easy to store and carry.
  • Customer Service: If you have any questions or problems, please feel free to contact us and we will get back to you within 24 hours.
  • Manufacture: star sound source
  • Item Weight: 0.564 ounces
  • Batteries: 1 CR2 batteries required. (included)
  • Editor's Impressions Of The star sound source
  • Thermometer Accuracy [star rating='4.8']
  • Quality [star rating='3.3']
  • Value For Money [star rating='4.1']
  • Affordability [star rating='4']

star sound source Final Thoughts

"Fish and me happy."

It's kind of difficult to hide and keep out of the way. I used to have a large hang in the side tank that you couldn't miss. I have mine on my 60 gallon cube marine tank. Now I'm getting back in on a much smaller scale with 3 gallon Acrylic Nano tanks. 6 inch long Bala Sharks that are known to be very unruly and boisterous. Ambient room temperature measures 72. I have mine on my 60 gallon cube marine tank.

Overall Score
3.9

[star rating="3.9"]
(75 Points)

7. 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 [star rating='4.3']
  • Quality [star rating='4.7']
  • Value For Money [star rating='4.4']
  • Affordability [star rating='4.4']

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

[star rating="4.1"]
(669 Points)

8. Marina " Diameterorado", 66 to 88 F / 19 to 31 C

User Ratings: 57 15

Marina 11223 First Impressions

"Very accurate."

This company is taking the long term view of how to do business right. I needed a solution that was not breakable and these do the trick! The suction works for a month at a time- in pool and hot tub circulation. The plastic from the suction cup quickly turned from a clear to a milky white. Then is started to give a low reading, and it is not reading the correct temperature. I got root rot after light leaks and high water temps. Then is started to give a low reading, and it is not reading the correct temperature.

  • Marina " Diameterorado", 66 to 88 F / 19 to 31 C
  • Easy To Mount Thermometer For Glass Aquariums
  • Measures In Celsius And Fahrenheit
  • Temperature Range Of 66 To 88-Degree Fahrenheit And 19 To 31-Degree Celsius
  • Equipped With Adhesive Backing For Durable Hold
  • Measures 3-inch long
  • Manufacture: Marina
  • Product Dimensions: 0.3 x 3 x 7 inches; 0.32 Ounces
  • Editor's Impressions Of The Marina 11223
  • Thermometer Accuracy [star rating='4.7']
  • Quality [star rating='3.6']
  • Value For Money [star rating='3.2']
  • Affordability [star rating='4.4']

Marina 11223 Final Thoughts

"That adds peace of mind."

I find that the temps are accurate, and this product gives added peace of mind. I ordered a new one and it works GREAT! Very accurate, have checked it with other thermometers as well. 89 I could buy Six Thermometers with Six included batteries. One being a very expensive digital. I've checked it against two other thermometers that are accurate. He was moving slow in the winter and we realized he needed a heater!

Overall Score
4.0

[star rating="4"]
(47 Points)

9. Penn-Plax Standing Thermometer

User Ratings: 49

Penn-Plax TS First Impressions

"Which is good."

So the extra units will always come in handy. The suction works for a month at a time- in pool and hot tub circulation. Now if it falls into a sink full of water, it's not a problem. It is large enough to see without being obtrusive. Place it on your aquarium and you are good to go. And I just really started to doubt it. I had my heater set at 73-degrees and the thermometers showed 74.

  • Penn-Plax Standing Thermometer
  • Standing Style Glass Aquarium Thermometer
  • Accurate Easy To Read
  • This Product Is Made In China
  • Package Dimensions: 0.6" L X 3.1" W X 7.4" H
  • Manufacture: Penn Plax, INC.
  • Product Dimensions: 0.6 x 3.1 x 7.4 inches; 0.8 Ounces
  • Editor's Impressions Of The Penn-Plax TS
  • Thermometer Accuracy [star rating='3.7']
  • Quality [star rating='4.1']
  • Value For Money [star rating='4.9']
  • Affordability [star rating='5']

Penn-Plax TS Final Thoughts

"Close enough I reckon!"

I recommend gluing the suction cups in place where needed for long-term installation. A bit large for anything smaller than 5 gallons, but that's to be expected. I use a small flashlight if I don't want to brighten the area. My poor fish was in 86 degrees water for a month. The only reason I didn't give this 5 stars is because my betta fish didn't like it. So this is the extreme end of the high temperature range. Just BE CAREFUL WHEN ADJUSTING, IT IS GLASS AND WILL BREAK.

Overall Score
4.3

[star rating="4.3"]
(13 Points)

10. KEWAYO 4 Pieces Fast Read Aquarium Thermometer - Simple Setting, Accurate Reading, Suitable for Aqua...

User Ratings: 43 33

KEWAYO First Impressions

"It is within."

I ordered this guy and it was 6 degrees hotter than the digital! I'm pretty sure those reviewers have acrylic tanks. The suction works for a month at a time- in pool and hot tub circulation. 2 deg, if it was 32, it would be a SOLID block of ice. My only complaint is that they tend to be a one time use. All are pretty accurate within one degree as claimed. At least in the first 3 months of use.

  • KEWAYO 4 Pieces Fast Read Aquarium Thermometer - Simple Setting, Accurate Reading, Suitable for Aquarium, Reptile, Turtle
  • Measurement range: Celsius degree18-34C, Fahrenheit degree 64-93F
  • Monitor the temperature of the fish tank - keep the fish, shrimp, reptiles, and turtle to make sure that the water is not too hot or too cold. The irregular water temperature can be harmful to the health of your fish
  • Easy to install, can be adsorbed outside of the Aquarium, to help you observe the temperature of the water in your aquarium and keep a watchful eye on the living environment of your pet fish.
  • The thermometer changes its color according to the surrounding temperature
  • Aquarium Thermometer is suitable for any size aquarium
  • Manufacture: KEWAY
  • Product Dimensions: 7.9 x 4.7 x 0.05 inches; 0.64 Ounces
  • Editor's Impressions Of The KEWAYO
  • Thermometer Accuracy [star rating='2.8']
  • Quality [star rating='3.8']
  • Value For Money [star rating='3.3']
  • Affordability [star rating='3.2']

KEWAYO Final Thoughts

"I opened the first three."

Have checked them against the glass thermometers and the accuracy is right on. I used these to raise chicks, and in my parrot cages. Instead she sent a new package of two, both of which work. Was going to get a floater until I saw this magnetic one! This doesn't bother me as it ws so cheap. Just BE CAREFUL WHEN ADJUSTING, IT IS GLASS AND WILL BREAK. One of my aquariums is glass, and the other two are plastic.

Overall Score
3.4

[star rating="3.4"]
(20 Points)

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