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. JJMG Fish Tank Thermometer LCD Digital Aquarium Water Terrarium Temperature New Stick-on Glass Round...

User Ratings: 65 12

JJMG First Impressions

"Which is good."

It's kind of difficult to hide and keep out of the way. The digital display itself is easy to read at a glance. A battery can last you up to six months, I'd say, but expect more like three. The plastic from the suction cup quickly turned from a clear to a milky white. Only thing I don't love is how long the cord is. 50 thermometers, reads much easier and no suction cup residue, also looks better. I can't say which is the most accurate and don't really care.

  • JJMG Fish Tank Thermometer LCD Digital Aquarium Water Terrarium Temperature New Stick-on Glass Round Thin Monitor Peel and Stick Easy Installation Fahrenheit Only
  • MAINTAINS NATURAL TROPICAL HABITAT FOR YOU PET - It Is Important To Make Their Environment Temperature As Close As Possible To Their Natural Habitat. Having A Temperature Is Essential To Ensure The Perfect Temperature For Your Pets.
  • ACCURATELY MONITOR WATER TEMPERATURE IN FAHRENHEIT - Digital Thermometer Clearly Displays In Fahrenheit. Don’t Let Your Fish Tank Tell You It’s Too Cold or Hot For Them By Getting ill or Risk of Losing Them. It Quickly And Accurately Tells You The Temperature At A Glance Anytime.
  • AQUA TERRARIUM - 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, Etc.
  • EASY SET UP - Self-Adhesive Fish Tank Thermometer Can Easily Be Installed By Tearing Down The Film At The Back Then Simply Sticking It To The Outer Glass Aquarium. Designed For Secure Convenient Placement.
  • EASY TO READ - Large LCD Display Big Numbers Showing Aquarium Temperature.
  • Manufacture: JJMG
  • Editor's Impressions Of The JJMG
  • Thermometer Accuracy [star rating='3.2']
  • Quality [star rating='3.2']
  • Value For Money [star rating='4.4']
  • Affordability [star rating='3.1']

JJMG Final Thoughts

"They are within 0."

Excellent working for our bearded dragon tank. Since adding one of these, it has been much easier to monitor the temp of my tanks. I used these on a number of my aquariums that have discus fish in them. I'm pretty sure those reviewers have acrylic tanks. Ambient room temperature measures 72. These are the perfect size to be easily read while not being obtrusive. If the digital display starts to get dim, it's time for a new battery.

Overall Score
4.1

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

5. Glass Hydrometer Saltwater Temperature Thermometer Aquarium Fish Tank Marine

Aisoway First Impressions

"It works great."

You can use the thermometer with or without the plastic suction cup. It is large enough to see without being obtrusive. Ordered three of these and they do the job. So the extra units will always come in handy. Set all six probes up in a terrarium with a constant temp of 88. The display can be set to Fahrenheit or Celsius. Have checked them against the glass thermometers and the accuracy is right on.

  • Glass Hydrometer Saltwater Temperature Thermometer Aquarium Fish Tank Marine
  • Aquarium and exo terra reptile tank thermometer.
  • Size: 19.5cm.
  • Package included:1 x Thermometer.
  • Applicable both on the land and in the water.
  • Made of high quality glass, clear and easy to read. Stable and durable enough for a long time use.
  • Manufacture: Aisoway
  • Item Weight: 1.13 ounces
  • Product Dimensions: 1.97 x 1.97 x 1.97 inches
  • Editor's Impressions Of The Aisoway
  • Thermometer Accuracy [star rating='4']
  • Quality [star rating='4.6']
  • Value For Money [star rating='4.9']
  • Affordability [star rating='5']

Aisoway Final Thoughts

"So glad i got these!"

And for the price you cant beat it. 49 thermometer that is 100% accurate. This company is taking the long term view of how to do business right. The plastic from the suction cup quickly turned from a clear to a milky white. I am extremely pleased with this product. This is how you calibrate a thermometer. This company is taking the long term view of how to do business right.

Overall Score
5.0

[star rating="5"]
(1 Points)

6. Digital Mini Automatic LCD Aquarium Fish Tank Food Feeder Timer up to 4 Feeding Times + High Accurac...

User Ratings: 27 24

hossen B008R6NWOU First Impressions

"LOVE these thermometers."

I think the people who said the suction cup broke. I bent it a little bit and when I put it back it was perfectly fine. I bought these for my dwc reservoirs. So far I've been very thrilled with these. Now I'm getting back in on a much smaller scale with 3 gallon Acrylic Nano tanks. Works well in my betta tank, but provide a couple hours for it to read temp changes. I did have a problem with one in my first pack of 6.

  • Digital Mini Automatic LCD Aquarium Fish Tank Food Feeder Timer up to 4 Feeding Times + High Accuracy Submersible Aquarium Index Thermometer
  • Made in China
  • Package height :12.1 cm
  • Package length :8.0 cm
  • Package width :11.1 cm
  • Manufacture: hossen
  • Product Dimensions: 4.8 x 3.15 x 4.41 inches; 6.4 Ounces
  • Batteries: 2 AAA batteries required.
  • Editor's Impressions Of The hossen B008R6NWOU
  • Thermometer Accuracy [star rating='3.1']
  • Quality [star rating='4']
  • Value For Money [star rating='3.5']
  • Affordability [star rating='2.8']

hossen B008R6NWOU Final Thoughts

"This is perfect."

These things are useful for a lot besides pet husbandry, too. You can use the thermometer with or without the plastic suction cup. And I just really started to doubt it. Instead she sent a new package of two, both of which work. 2 deg, if it was 32, it would be a SOLID block of ice. The extra batteries where very much appreciated and came in handy. Very impressed, I have now had them in used for a month so far.

Overall Score
3.3

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

7. Aquarium Submersible Glass Thermometer With Suction 14Cm Hydrometer Waterproof Fish Tank Durable

User Ratings: 59

Fashion Life First Impressions

"Great for price."

He was moving slow in the winter and we realized he needed a heater! Place it on your aquarium and you are good to go. One being a very expensive digital. When and if we run out of this batch, I'll instantly order another batch. So this is the extreme end of the high temperature range. So, in those cases, I find it easier to simply replace it. He was moving slow in the winter and we realized he needed a heater!

  • Aquarium Submersible Glass Thermometer With Suction 14Cm Hydrometer Waterproof Fish Tank Durable
  • Aquarium and exo terra reptile tank thermometer.
  • Made of high quality glass, clear and easy to read.
  • Stable and durable enough for a long time use.
  • Manufacture: Fashion Life
  • Editor's Impressions Of The Fashion Life
  • Thermometer Accuracy [star rating='4.4']
  • Quality [star rating='3.5']
  • Value For Money [star rating='3.5']
  • Affordability [star rating='4.8']

Fashion Life Final Thoughts

"Love it for my turtles."

49 thermometer that is 100% accurate. Personally I do not mind the way it looks in my aquarium. 50 thermometers, reads much easier and no suction cup residue, also looks better. I used to have a large hang in the side tank that you couldn't miss. I bent it a little bit and when I put it back it was perfectly fine. I am extremely pleased with this product. 89 I could buy Six Thermometers with Six included batteries.

Overall Score
4.2

[star rating="4.2"]
(4 Points)

8. REPTI ZOO Reptile Terrarium Thermometer Hygrometer Dual Gauges Pet Rearing Box Reptile Thermometer a...

User Ratings: 64 5

REPTI ZOO First Impressions

"No issues."

So this is the extreme end of the high temperature range. I read some of the 1 star reviews and most of them are not about the product. Then she followed up again on that, asking if they had arrived and were okay. 2 deg, if it was 32, it would be a SOLID block of ice. The suction will never be the same. Place it on your aquarium and you are good to go. The digital display is nice and small as well.

  • REPTI ZOO Reptile Terrarium Thermometer Hygrometer Dual Gauges Pet Rearing Box Reptile Thermometer and Humidity Gauge
  • Accurate measure temperature and humidity in vivariums, hatchers, brooders, propagators, etc
  • Easy to read:uses different color coded segments for easy reading
  • Easy to install:sticky pad on reverse allows it to be mounted on most surfaces
  • No battery,energy saving and environmental protection
  • 100% quality guarantee:we provide 12 months quality guarantee,if you have any question about our product,please contact us,we will reply and help you in 24 hours
  • Manufacture: REPTI ZOO
  • Part Number: RHT01
  • Item Weight: 1.58 ounces
  • Batteries Included?: No
  • Batteries Required?: No
  • Editor's Impressions Of The REPTI ZOO
  • Thermometer Accuracy [star rating='5']
  • Quality [star rating='4']
  • Value For Money [star rating='3.9']
  • Affordability [star rating='4.8']

REPTI ZOO Final Thoughts

"Just received it today."

My poor fish was in 86 degrees water for a month. So far I've been very thrilled with these. I'm pretty sure those reviewers have acrylic tanks. 6 in a pack, extra batteries, easy set up, great price. I use a small flashlight if I don't want to brighten the area. They are within a degree or two of other thermometers I've checked to compare them. You can glue, tape or simply cover the cords in the tank to keep them discreet.

Overall Score
4.3

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

9. KORDON #37444 Malachite for Aquarium, 4-Ounce, Green

User Ratings: 74 4

Kordon 479042 First Impressions

"Just received it today."

And for the price you cant beat it. 6F all six took about three minutes to read between 88. I removed the batteries of the units I wasn't using right away. It works equally well on all of them. My 50+ eyes cannot read a regular tank thermometer without squinting. I read some of the 1 star reviews and most of them are not about the product. It is easy to use and install it'disappears' in your tank it is so unobtrusive.

  • KORDON #37444 Malachite for Aquarium, 4-Ounce, Green
  • Kordon malachite green 4oz
  • Malachite green is also effective against common external fungi infections of fishes and eggs
  • Malachite green is an effective medication used for the control of various external parasites
  • Manufacture: TopDawg Pet Supply
  • Product Dimensions: 0.02 x 0.02 x 0.02 inches; 0.32 Ounces
  • Editor's Impressions Of The Kordon 479042
  • Thermometer Accuracy [star rating='5']
  • Quality [star rating='4.7']
  • Value For Money [star rating='5']
  • Affordability [star rating='5']

Kordon 479042 Final Thoughts

"This is perfect."

You dont HAVE to stick the display onto your tank. 82 PER THERMOMETER with battery included. I did have a problem with one in my first pack of 6. Set all six probes up in a terrarium with a constant temp of 88. My only complaint is that they tend to be a one time use. I have always had trouble reading the color temp. Was going to get a floater until I saw this magnetic one!

Overall Score
4.5

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

10. Horizontal Wide Range Liquid Crystal Thermometer

Aquarium Technology First Impressions

"That adds peace of mind."

It is about 6 inches in length and roughly an inch wide. 6F all six took about three minutes to read between 88. It is my opinion that everyone should have these that are in the Aquarium Hobby. And is easily hidden behind a plant. I find that the temps are accurate, and this product gives added peace of mind. The digital display itself is easy to read at a glance. We are using them to measure various temperatures inside and outside of a motorhome.

  • Horizontal Wide Range Liquid Crystal Thermometer
  • Range from 70 degrees F to 102 degrees F
  • Ideal for terrariums or aquariums
  • Easy to read indicators
  • Fahrenheit/Celcius scale
  • Mounts to galss or acrylic surfaces
  • Manufacture: Aquarium Technology, Inc
  • Item Weight: 1 Pounds
  • Editor's Impressions Of The Aquarium Technology
  • Thermometer Accuracy [star rating='5']
  • Quality [star rating='5']
  • Value For Money [star rating='5']
  • Affordability [star rating='4.9']

Aquarium Technology Final Thoughts

"Not just for aquariums!"

A battery can last you up to six months, I'd say, but expect more like three. Now I'm getting back in on a much smaller scale with 3 gallon Acrylic Nano tanks. We are using them to measure various temperatures inside and outside of a motorhome. Very impressed, I have now had them in used for a month so far. It worked great and I highly recommend it! It is about 6 inches in length and roughly an inch wide. It's kind of difficult to hide and keep out of the way.

Overall Score
5.0

[star rating="5"]
(2 Points)

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