Editor's Choice - Our Favorite Unknown Aquarium Thermometers

1. LCD Digital Fish Tank Temperature Control Sensor Thermometer Wired Aquarium Fish Tank

Unknown First Impressions

"2 deg of 32."

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 used these to raise chicks, and in my parrot cages. I have mine on my 60 gallon cube marine tank. I have kept aquariums for about 45 years. So versatile, I can read the temperatures literally anywhere. Still a recommendation for me due to price and accuracy.

  • LCD Digital Fish Tank Temperature Control Sensor Thermometer Wired Aquarium Fish Tank
  • Manufacture: Unknown
  • Editor's Impressions Of The Unknown
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

Unknown Final Thoughts

"A solid five stars."

I have this thermometer on all my tanks. So versatile, I can read the temperatures literally anywhere. Simple fix, you adjust the thermometer within the suction cup and VIOLA! At least in the first 3 months of use. For something so cheap, they are working remarkably well. In this scenario it would probably get knocked loose a lot. Still a recommendation for me due to price and accuracy.

Overall Score
4.0


(1 Points)

2. Zoo Med Laboratories SZMHC10 Hermit Crab Thermometer

User Ratings: 84 8

Zoo Med 976001 First Impressions

"And he is a betta."

Then is started to give a low reading, and it is not reading the correct temperature. I removed the batteries of the units I wasn't using right away. I used these to raise chicks, and in my parrot cages. I used these on a number of my aquariums that have discus fish in them. 49 thermometer that is 100% accurate. One extra battery came with each unit. You dont HAVE to stick the display onto your tank.

  • Zoo Med Laboratories SZMHC10 Hermit Crab Thermometer
  • Zoo Med Laboratories Hermit Crab Thermometer
  • High range LCD thermometer for monitoring the temperature in your crabs terrarium
  • Allows precise monitoring of both temperature and humidity in your hermit crabs home
  • Manufacture: TopDawg Pet Supply
  • Product Dimensions: 0.02 x 0.02 x 0.02 inches; 0.32 Ounces
  • Editor's Impressions Of The Zoo Med 976001
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

Zoo Med 976001 Final Thoughts

"It's accurate I tell you."

I use a small flashlight if I don't want to brighten the area. I use a small flashlight if I don't want to brighten the area. 6F all six took about three minutes to read between 88. And is easily hidden behind a plant. Ordered three of these and they do the job. I just wrote it off as a minor loss. The suction will never be the same.

Overall Score
4.5


(21 Points)

3. 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
  • Quality
  • Value For Money
  • Affordability

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


(2 Points)

4. Aquarium Digital Thermometer

User Ratings: 52

AquaTop DTG-25 First Impressions

"Versatile."

I came here to give this product a positive review. The only reason I didn't give this 5 stars is because my betta fish didn't like it. When I set up my newest tank I will be getting another one of these. So the extra units will always come in handy. You can glue, tape or simply cover the cords in the tank to keep them discreet. This little wonder allows me to see at a glance that everything is as it should be. Bought the two pack of thermometers.

  • Aquarium Digital Thermometer
  • Included Components: Atp Thermometer External Dual
  • Age Range Description: All Life Stages
  • Manufacture: Aquatop
  • Product Dimensions: 8 x 3 x 2 inches; 3.84 Ounces
  • Editor's Impressions Of The AquaTop DTG-25
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

AquaTop DTG-25 Final Thoughts

"They are within 0."

A battery can last you up to six months, I'd say, but expect more like three. This company is taking the long term view of how to do business right. I got the second one as a bonus that I'm now using in my old tank. Love it, it's easy to read and keeps an accurate temp. Now if it falls into a sink full of water, it's not a problem. 50 thermometers, reads much easier and no suction cup residue, also looks better. It started working as soon as I put it in and has been working ever since.

Overall Score
4.0


(3 Points)

5. Aquarium Sticker Thermometer, Precise Measurement of Tank’s Temperature, Ideal for Fish, Shrimps &...

User Ratings: 69 7

SunGrow First Impressions

"Love this product!"

I have bought many many temperature gauges for my various fish tanks over the years. All were Close enough for a fish tank and other uses. Then she followed up again on that, asking if they had arrived and were okay. One being a very expensive digital. I find that the temps are accurate, and this product gives added peace of mind. I ordered this guy and it was 6 degrees hotter than the digital! One of my aquariums is glass, and the other two are plastic.

  • Aquarium Sticker Thermometer, Precise Measurement of Tank’s Temperature, Ideal for Fish, Shrimps & Turtles, Ensures pet Health, Increases Lifespan, Peel & Stick Installation, 2 Color Indicators
  • ✔ MEASURES TANK TEMPERATURE FOR PROPER & CONSISTENT MONITORING --- Maintaining an aquarium tank with pets means having to actively measure the temperature of their living environment. Always being aware of its correct hotness or coldness level can make you do necessary adjustments to ensure that it is consistently ideal for your pets. Aquarium Sticker Thermometer by SunGrow will help you determine if your aquatic pets are living in a suitable environment condition.
  • ✔ HELPS PROTECT YOUR AQUARIUM PETS FROM DISEASES AND DEATH --- Fish and amphibians are highly sensitive even to a slight change in temperature. It is a must to keep their surroundings as close as possible to their natural habitat. An inconsistent aquatic environment can cause bettas, turtles to be stressed, sick or even die.
  • ✔ AIDS IN REPRODUCTION & LONGER LIFESPAN --- Cold-blooded species change with the temperature of their surroundings. Keeping it right along with proper nutrition can triple their lifespan. Any big difference from the ideal will directly affect the breeding process. It also affects their growth development, activity levels and overall wellness.
  • ✔ EASY MONITORING OF TEMPERATURE WITH 2-COLOR INDICATORS --- It’s time to stop the guessing game of aquarium temperature because this handy sticker thermometer will give you the precise range of your tank’s temperature with 2-color indicators. Blue color depicts the exact temperature. When you spot both Green and Blue colors on the strip, it indicates that the temperature is between them.
  • ✔ NO SUCTION CUPS OR BATTERIES NEEDED --- This self-adhesive strip can be installed in two easy steps: Peel & Stick! No need to worry about suction cups or batteries and experience a worry-free monitoring. Measuring 5.1” tall by 0.7” wide, it can read a temperature range between 64 and 93 Degree Fahrenheit / 18 and 34 Degree Celsius. Please note that Fahrenheit is in big bold letters and Celsius is in small.
  • Manufacture: Luffy Pets Collection
  • Editor's Impressions Of The SunGrow
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

SunGrow Final Thoughts

"Fish are doing very well."

The units each had a battery in place and situated for immediate use. I used these on a number of my aquariums that have discus fish in them. The lid is textured aluminum, and the suction cups don't stick to that. Works well in my betta tank, but provide a couple hours for it to read temp changes. We are using them to measure various temperatures inside and outside of a motorhome. All were Close enough for a fish tank and other uses. The digital display is nice and small as well.

Overall Score
4.3


(53 Points)

6. UPLY Aquarium Thermometer Digital Fish Tank Thermometer for Water Temperature

User Ratings: 53 18

UPLY First Impressions

"Easy to setup in tank."

Ambient room temperature measures 72. Still a recommendation for me due to price and accuracy. I ordered a new one and it works GREAT! I tested this in a cup crammed full of ice and some water. I think the people who said the suction cup broke. Since it is a mercury thermometer, it is very accurate. Very accurate, have checked it with other thermometers as well.

  • UPLY Aquarium Thermometer Digital Fish Tank Thermometer for Water Temperature
  • Best Thermometer For Your Fish --- How to keep our fish healthy? The right temperature is critical. Every fish has a water temperature suitable for them to survive. As a breeder, we need to keep track of the temperature of the water in our fish tanks. Therefore, having an an accurate and effective aquarium thermometer is important to ensure the perfect temperature for your pet fish.
  • EASY TO READ --- No need to stop, no need to observe the scale, only you need to gently glance, you can easily get an accurate water temperature from UPLY Aquarium Thermometer's Display. Very Easy!!
  • COMPLETELY WATERPROOF --- UPLY aquarium thermometer uses waterproof ring design, can completely submerge into the water, water temperature measurement is more accurate. ( Your Betta can also use it as a rest leaf.)
  • WIRELESS --- The extra cables will make your tank look messy and affect the activity space of your fish. UPLY Aquarium Thermometer doesn't have any extra lines, and the simple design lets your use easier
  • WIDE TEMPERATURE RANGE --- Temperature range -58°F to 158°F, allows you to use this thermometer at any temperature. Not only a fish tank, you can use it wherever you want.
  • Manufacture: UPLY
  • Product Dimensions: 1.97 x 5.12 x 1.18 inches; 1.98 Ounces
  • Batteries: 1 LR44 batteries required. (included)
  • Editor's Impressions Of The UPLY
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

UPLY Final Thoughts

"Just received it today."

I have this thermometer on all my tanks. You can glue, tape or simply cover the cords in the tank to keep them discreet. 82 PER THERMOMETER with battery included. The extra batteries where very much appreciated and came in handy. Very accurate, have checked it with other thermometers as well. Love it, it's easy to read and keeps an accurate temp. 6 in a pack, extra batteries, easy set up, great price.

Overall Score
3.6


(27 Points)

7. DollaTek 2Pcs LCD Digital Aquarium Thermometer Fish Tank Water Terrarium Temperature - Yellow

User Ratings: 47

DollaTek First Impressions

"Just received it today."

Then she followed up again on that, asking if they had arrived and were okay. Ambient room temperature measures 72. The suction will never be the same. In this scenario it would probably get knocked loose a lot. I did have a problem with one in my first pack of 6. Ordered three of these and they do the job. This doesn't bother me as it ws so cheap.

  • DollaTek 2Pcs LCD Digital Aquarium Thermometer Fish Tank Water Terrarium Temperature - Yellow
  • 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.
  • Item Weight: 2.11 ounces
  • Editor's Impressions Of The DollaTek
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

DollaTek Final Thoughts

"Great deal."

50 thermometers, reads much easier and no suction cup residue, also looks better. I have bought many many temperature gauges for my various fish tanks over the years. 2 deg, if it was 32, it would be a SOLID block of ice. So, in those cases, I find it easier to simply replace it. He acted aggressively towards it and so I ultimate ended up removing it due to that. This thermometer is spot on accurate. Since adding one of these, it has been much easier to monitor the temp of my tanks.

Overall Score
3.8


(10 Points)

8. American Thermal Horizontal Aquarium Thermometer

User Ratings: 59 4

American Thermal BC002008 First Impressions

"I immediately ordered it."

So far, they're all doing their job in my four tanks and I am quite content. Was going to get a floater until I saw this magnetic one! It works equally well on all of them. My poor fish was in 86 degrees water for a month. Very accurate, have checked it with other thermometers as well. 6 in a pack, extra batteries, easy set up, great price. The digital display is nice and small as well.

  • American Thermal Horizontal Aquarium Thermometer
  • Accurate.
  • Easy-to-read.
  • Mounts on the outside of your aquarium.
  • New movable thermometer.
  • Horizontal.
  • Manufacture: American Thermal
  • Product Dimensions: 7.4 x 1 x 0.1 inches; 0.35 Ounces
  • Editor's Impressions Of The American Thermal BC002008
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

American Thermal BC002008 Final Thoughts

"Great price."

The extra batteries where very much appreciated and came in handy. The lid is textured aluminum, and the suction cups don't stick to that. They reviewed the packaging or shipping by saying it arrived broken. Good cheap accurate aquarium thermometer. The temperature fluctuated a lot with it. The digital display itself is easy to read at a glance. Far more accurate than the usual small glass ones or external LCD strips.

Overall Score
4.2


(351 Points)

9. Digital Display Thermometer - Aquarium, Terrarium, Fish Tank - Fahrenheit & Celsius

User Ratings: 34

Invert Aquatics First Impressions

"Very accurate."

These digital thermometers are great and there is no guesswork involved. This is my first 5 star review out of many many reviews on Amazon. I think the people who said the suction cup broke. I have this thermometer on all my tanks. You can not swivle the thermometer to face a certain way. Sure enough the digital thermometer was way off by 6 degrees! For something so cheap, they are working remarkably well.

  • Digital Display Thermometer - Aquarium, Terrarium, Fish Tank - Fahrenheit & Celsius
  • Easy to read Digital Display can be set to Fahrenheit or Celsius (Unit is 2 1/4" x 1 1/2")
  • Battery Included, 2 Suction Cups Included for easy Mounting, 37" Long Probe Line
  • Accurate and Fast Readings of your Aquarium or Terrarium
  • Submerge only the probe into water (Display remains dry on outside of tank)
  • Ranges from -58 Degrees Fahrenheit to 158 Degrees Fahrenheit
  • Manufacture: Invert Aquatics
  • Batteries: 1 Unknown batteries required. (included)
  • Editor's Impressions Of The Invert Aquatics
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

Invert Aquatics Final Thoughts

"Doing the math."

We are using them to measure various temperatures inside and outside of a motorhome. In the right situation this magnet thermometer is the best available. Water tested with Autidefy brand for two hours. I can't say which is the most accurate and don't really care. Now I'm getting back in on a much smaller scale with 3 gallon Acrylic Nano tanks. 89 I could buy Six Thermometers with Six included batteries. I bent it a little bit and when I put it back it was perfectly fine.

Overall Score
4.0


(3 Points)

10. Non-Contact Infrared Thermometer, ELVASEN Digital Laser Temperature Gun Forehead Infrared Thermomete...

User Ratings: 38 27

ELVASEN First Impressions

"Great product!"

82 PER THERMOMETER with battery included. In this scenario it would probably get knocked loose a lot. I find that the temps are accurate, and this product gives added peace of mind. Very impressed, I have now had them in used for a month so far. And is easily hidden behind a plant. I have this thermometer on all my tanks. Excellent working for our bearded dragon tank.

  • Non-Contact Infrared Thermometer, ELVASEN Digital Laser Temperature Gun Forehead Infrared Thermometer for Baby, Adult, Child, Surface of Objects
  • Measurement accuracy: Body Temperature -- outside (35-42) ℃ ± 0.3 ℃ / 0.54 ℉ / (35-42) ℃ ± 0.2 ℃ / 0.4 ℉; Object Temperature: ± 1.0 ℃ / 1.8 ℉.(Not include battery)
  • Measurement range: Body Temperature -- 32 ℃ to 42.9 ℃ (89.6 ℉ to 109.2 ℉); Object Temperature -- 0 ℃ to 100 ℃ (32 ℉ to 212 ℉)
  • Product Introduction: This product is composed of high-precision infrared sensor, microprocessor, memory chip, power supply, electro-acoustic component, liquid crystal display and housing. It can quickly and accurately measure human body temperature or object temperature.
  • Usage rules -- Human Body Measurement: While waiting, point the thermometer probe at the center of the forehead (above the eyebrow center) and keep it vertical, distance 3 ~ 5cm, press the measurement key to display the measured temperature within about 0.5 seconds; While waiting, press the "-" button once to switch to the temperature measurement mode. Point the thermometer probe at the object and press the measurement button. The measurement temperature will be displayed in about 1 seconds.
  • Working Principle: This product adopts infrared temperature sensing method to measure temperature display or data output. It displays the temperature of the measured object by measuring the thermal radiation of the forehead or object.
  • Manufacture: ELVASEN
  • Editor's Impressions Of The ELVASEN
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

ELVASEN Final Thoughts

"So far loving it."

Personally I do not mind the way it looks in my aquarium. For something so cheap, they are working remarkably well. My only complaint is that they tend to be a one time use. Now I'm getting back in on a much smaller scale with 3 gallon Acrylic Nano tanks. So much easier than the ones that hang on the inside. Who knows, whatever it was, it was revolting! I can't say which is the most accurate and don't really care.

Overall Score
3.4


(48 Points)

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