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 [star rating='3.1']
  • Quality [star rating='3.2']
  • Value For Money [star rating='3.2']
  • Affordability [star rating='4.8']

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

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

2. VIVOSUN 2-Pack LCD Digital Aquarium Thermometer Fish Tank Water Terrarium Temperature with Suction C...

User Ratings: 71 3

VIVOSUN First Impressions

"Fast accurate readings."

Excellent working for our bearded dragon tank. It is my opinion that everyone should have these that are in the Aquarium Hobby. I ordered a new one and it works GREAT! The non-working ones still provide 2 batteries each AND. Water tested with Autidefy brand for two hours. The lid is textured aluminum, and the suction cups don't stick to that. This doesn't bother me as it ws so cheap.

  • VIVOSUN 2-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 39.37 inch (1 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 [star rating='3.6']
  • Quality [star rating='5']
  • Value For Money [star rating='5']
  • Affordability [star rating='4.2']

VIVOSUN Final Thoughts

"There is no question."

Love it, it's easy to read and keeps an accurate temp. And I just really started to doubt it. 6 inch long Bala Sharks that are known to be very unruly and boisterous. Then is started to give a low reading, and it is not reading the correct temperature. Far more accurate than the usual small glass ones or external LCD strips. It's kind of difficult to hide and keep out of the way. I came here to give this product a positive review.

Overall Score
4.5

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

3. Aquarium Thermometer with Alarm,Fish Tank Thermometer with Large Clear Screen,Reptile Thermometer wi...

User Ratings: 75

Atsani First Impressions

"Sticks easy."

6F all six took about three minutes to read between 88. I used to have a large hang in the side tank that you couldn't miss. Simple fix, you adjust the thermometer within the suction cup and VIOLA! Have checked them against the glass thermometers and the accuracy is right on. I don't think they are backlit but for the price they are still nice. It is always where yo last put it and it is very easy to see and read. I used these on a number of my aquariums that have discus fish in them.

  • Aquarium Thermometer with Alarm,Fish Tank Thermometer with Large Clear Screen,Reptile Thermometer with Probe and LCD Digital,Thermometer Hygrometer Stick on Tank for Reptile,Turtle,Salt & Freshwater
  • 【LCD Digital & Temperature Warning】-- Concise and stylish aquarium thermometer,digital number display on the large clear screen ensures you can read the fish tank's current water temperature,indoor temperature,and battery power quickly and accurately without any blind spots.High and low temperature warnings,you can set high and low temperature thresholds.Can also used for measure the temperature for reptile and turtle.
  • 【Easy to Use】-- Atsani Aquarium Thermometer is easy to use.Tear off the double-sided adhesive,stick one side to the circular suction cup of the hook,and stick the other side to the appropriate position of the fish tank.Submerge the probe into the fish tank to measure water temperature (submerge only the probe,do not submerge the whole thermometer in the water).You can choose either Fahrenheit or Celsius scale according to your need.
  • 【Digital Display & Alarm】-- Atsani Fish Tank Thermometer can display high temperature threshold,low temperature threshold,main temperature,negative temperature (indoor temperature),humidity.Each data presented clearly on the screen.You can get all the information you need.This thermometer will warn you if the temperature is too high.
  • 【Newest Design】-- Digital number display on thermometer's large clear screen ensures you to read current temperature quickly and accurately without any blind zone.The thermometer body and the water temperature probe are separated in design,which is more convenient and easier to disassemble.Button design,easy setting of water temperature meter parameters.Each thermometer is equipped with an LR44 battery which can be used for 5 months.
  • 【Widely Used】-- Fish tank thermometer 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.We provide a year quality guarantee.If you have any questions about our product please contact us.
  • Manufacture: Atsani
  • Editor's Impressions Of The Atsani
  • Thermometer Accuracy [star rating='5']
  • Quality [star rating='5']
  • Value For Money [star rating='3.9']
  • Affordability [star rating='5']

Atsani Final Thoughts

"And I am glad I did."

I removed the batteries of the units I wasn't using right away. Good cheap accurate aquarium thermometer. It worked great and I highly recommend it! So far, they're all doing their job in my four tanks and I am quite content. These things are useful for a lot besides pet husbandry, too. I have to admit I had two reasons for buying six. The lid is textured aluminum, and the suction cups don't stick to that.

Overall Score
4.8

[star rating="4.8"]
(9 Points)

4. LANDUM Digital Aquarium Tank Fish Thermometer Temperature Sticker Dual Scale 1 Piece

LANDUM First Impressions

"Drop in the probe."

2 deg, if it was 32, it would be a SOLID block of ice. Excellent working for our bearded dragon tank. 82 PER THERMOMETER with battery included. I got root rot after light leaks and high water temps. The only reason I didn't give this 5 stars is because my betta fish didn't like it. A battery can last you up to six months, I'd say, but expect more like three. The lid is textured aluminum, and the suction cups don't stick to that.

  • LANDUM Digital Aquarium Tank Fish Thermometer Temperature Sticker Dual Scale 1 Piece
  • Application: Measure the temperature of your fish tank, your DIY Brew Beer and wine barrel, Terrarium, Greenhouse, Vivarium and any sort of pet tank, or any place in your house
  • Quality Workmanship: Made of high quality PET material, non toxic, safe and durable
  • Advantage: The right water temperature is very important for the health of your fish, get your beer and wine right or use in kitchen or around the home to monitor temperature
  • Special Design: Easy to install, just peel off the back of the sticker and the transparent protective film at the front and stick it on the outside wall of the aquarium, that is it.
  • Package Include: 1Piece x Aquarium Fish Tank Thermometer
  • Manufacture: LANDUM
  • Editor's Impressions Of The LANDUM
  • Thermometer Accuracy [star rating='5']
  • Quality [star rating='5']
  • Value For Money [star rating='5']
  • Affordability [star rating='4.8']

LANDUM Final Thoughts

"Would buy again."

I have it in both my aquariums now. At least in the first 3 months of use. The display can be set to Fahrenheit or Celsius. I use a small flashlight if I don't want to brighten the area. I used these on a number of my aquariums that have discus fish in them. It is my opinion that everyone should have these that are in the Aquarium Hobby. The suction cups work well anywhere I have placed it it has not Fallen.

Overall Score
5.0

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

5. Fluval Wireless 2in1 Digital Thermometer

User Ratings: 69 7

Fluval 11193 First Impressions

"Would recommend!"

Works well in my betta tank, but provide a couple hours for it to read temp changes. The suction will never be the same. Very accurate, have checked it with other thermometers as well. Instead she sent a new package of two, both of which work. I have mine on my 60 gallon cube marine tank. I came here to give this product a positive review. I came here to give this product a positive review.

  • Fluval Wireless 2in1 Digital Thermometer
  • 2-in-1: Measures water & room temperature accurately within 10C/20 F
  • Wireless technology: no probes or messy wires Large LCD display simultaneously shows aquarium and ambient room temperatures
  • Large, easy-to-read LCD Display
  • For fresh and saltwater aquariums
  • Manufacture: Rolf C. Hagen (USA) Corp.
  • Product Dimensions: 0.5 x 2.6 x 4.9 inches; 1.28 Ounces
  • Editor's Impressions Of The Fluval 11193
  • Thermometer Accuracy [star rating='3.4']
  • Quality [star rating='5']
  • Value For Money [star rating='5']
  • Affordability [star rating='4.5']

Fluval 11193 Final Thoughts

"Great product!"

The non-working ones still provide 2 batteries each AND. In this scenario it would probably get knocked loose a lot. Love it, it's easy to read and keeps an accurate temp. And is easily hidden behind a plant. Love it, it's easy to read and keeps an accurate temp. He acted aggressively towards it and so I ultimate ended up removing it due to that. Far more accurate than the usual small glass ones or external LCD strips.

Overall Score
4.4

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

6. Chuiouy Fish Tank Temp Meter Aquarium Thermometer LCD 3D Digital Electronic Temperature Recorder Tes...

Chuiouy First Impressions

"Hope this helps!"

It is my opinion that everyone should have these that are in the Aquarium Hobby. And I just really started to doubt it. SIX Digital Thermometers with SIX batteries INCLUDED working so well. I have mine on my 60 gallon cube marine tank. Good cheap accurate aquarium thermometer. For something so cheap, they are working remarkably well. I am extremely pleased with this product.

  • Chuiouy Fish Tank Temp Meter Aquarium Thermometer LCD 3D Digital Electronic Temperature Recorder Tester
  • ★ High transparent Crystal glass shell design, fashion and super 3D perspective effect!
  • ★Multi-purpose thermometer, can be used as a body thermometer, aquarium thermometer, indoor and outdoor thermometer and so on
  • ★ Exquisite small, two sides' adhesive stickers, convenient and simple
  • ★ Precise chip, High sensitive electronic sensors to measure temperature, accuracy up to 0.1 Degree
  • ★Ideal For: Aquarium,fish tank // Measuring Range: -45℃~80℃
  • Manufacture: #CY20190801013
  • Editor's Impressions Of The Chuiouy
  • Thermometer Accuracy [star rating='3.7']
  • Quality [star rating='2.7']
  • Value For Money [star rating='2.5']
  • Affordability [star rating='3.3']

Chuiouy Final Thoughts

"9, and 78."

So much so that I purchased a second set of 6. So the extra units will always come in handy. Checked with temp gun and the terrarium was on target at 88. In the right situation this magnet thermometer is the best available. I was using one of those ubiquitous cheap digital thermometers on Amazon. It works equally well on all of them. I have bought many many temperature gauges for my various fish tanks over the years.

Overall Score
3.0

[star rating="3"]
(1 Points)

7. SunGrow Digital pH and TDS Meter Set, Accurate Readings, Easy to Read LCD Screen, Monitor Aquarium, ...

User Ratings: 57 6

SunGrow First Impressions

"Great product!"

This thermometer is spot on accurate. 50 thermometers, reads much easier and no suction cup residue, also looks better. I just wrote it off as a minor loss. Checked with temp gun and the terrarium was on target at 88. I bent it a little bit and when I put it back it was perfectly fine. I think the people who said the suction cup broke. Set all six probes up in a terrarium with a constant temp of 88.

  • SunGrow Digital pH and TDS Meter Set, Accurate Readings, Easy to Read LCD Screen, Monitor Aquarium, Fruit, Tap Water, Pool Water, 4 LR44 Batteries Included
  • ✔ TWO-IN-ONE SOLUTION --- This Ph and TDS combo meter by SunGrow will give you the best of both worlds in one device. This SunGrow pack includes electrodes and components needed to test both the pH and TDS of any water solution. It’s easy to use and less equipment to deal with than two separate devices.
  • ✔ ENERGY-SAVING, LIGHTWEIGHT AND PORTABLE DEVICES--- This PH and TDS meter has a handheld pen-type design that weighs barely 1.7 oz making it lightweight and portable. It comes with a handy case that you can easily slip into a backpack or work bag if you need to bring it with you. The meter shuts off automatically after 10-minutes of non-use to conserve batteries. (BATTERIES INCLUDED)
  • ✔ CALIBRATION SCREWDRIVER INCLUDED --- These meters have been factory-calibrated and are designed to stay consistent. However, if you need to recalibrate your meter from time to time or you want to calibrate for different applications, you can use the screwdriver calibration tool included for continued accurate readings of your water. The TDS meter is most accurate when calibrated as close as possible to the sample to be tested.
  • ✔ HIGHLY ACCURATE READINGS --- This pH and TDS professional level water test meter precisely measures and monitors the levels in your aquarium or other liquid solutions. The SunGrow pH and TDS meter will give you extremely accurate readings of the ph levels and Total Dissolved Solid within ± 2% range.
  • ✔ MULTI-USE MEASURING TOOL--- This little tool is a valuable instrument for keeping a tab on various bodies of water. You can use it to make sure the level in your freshwater or saltwater aquarium is optimal for your fish, test water in a laboratory or for the hydroponically grown vegetables. You can also test the swimming pool, tap water, and spa water.
  • Manufacture: Luffy Pets Collection
  • Editor's Impressions Of The SunGrow
  • Thermometer Accuracy [star rating='3.7']
  • Quality [star rating='4.6']
  • Value For Money [star rating='5']
  • Affordability [star rating='5']

SunGrow Final Thoughts

"Easy to setup in tank."

When I set up my newest tank I will be getting another one of these. My 50+ eyes cannot read a regular tank thermometer without squinting. Love it, it's easy to read and keeps an accurate temp. I used to have a large hang in the side tank that you couldn't miss. It will make you wonder why nobody thought of it before. Bought the two pack of thermometers. Place it on your aquarium and you are good to go.

Overall Score
4.2

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

8. uxcell Temperature Gauge Aquarium Thermometer Celsius with Probe for Fish Tank

uxcell First Impressions

"Just received it today."

I used these to raise chicks, and in my parrot cages. The non-working ones still provide 2 batteries each AND. I've checked it against two other thermometers that are accurate. My only complaint is that they tend to be a one time use. We are using them to measure various temperatures inside and outside of a motorhome. It worked great and I highly recommend it! Works well in my betta tank, but provide a couple hours for it to read temp changes.

  • uxcell Temperature Gauge Aquarium Thermometer Celsius with Probe for Fish Tank
  • Temperature range: -50℃ ~ 110℃ (-58°F ~ + 158°F)
  • Designed to be embedded or can be surface mounted
  • Battery Operated (included) (Aprox 2 year battery life)
  • Remote wired probe can read temperature up to 3.3 feet away
  • Perfect for use in refrigerator, aquarium tank, fish tank, pet cage, bedroom or any other place that requires monitoring of temperature.
  • Manufacture: Uxcell
  • Part Number: A19010400ux0393
  • Item Weight: 0.81 ounces
  • Size: 1 Piece
  • Power Source: Battery Powered
  • Batteries Required?: No
  • Editor's Impressions Of The uxcell
  • Thermometer Accuracy [star rating='3.1']
  • Quality [star rating='4']
  • Value For Money [star rating='2']
  • Affordability [star rating='2']

uxcell Final Thoughts

"Great deal."

In the right situation this magnet thermometer is the best available. They reviewed the packaging or shipping by saying it arrived broken. 49 thermometer that is 100% accurate. This temperature read a perfect 32 degrees. So, in those cases, I find it easier to simply replace it. Love it, it's easy to read and keeps an accurate temp. I recommend gluing the suction cups in place where needed for long-term installation.

Overall Score
3.0

[star rating="3"]
(1 Points)

9. NITRIP Digital Aquarium Thermometer, DC16 LCD Waterproof Temperature Thermometer for Fish Tank

Nitrip First Impressions

"2-degrees."

A battery can last you up to six months, I'd say, but expect more like three. This doesn't bother me as it ws so cheap. Since it is a mercury thermometer, it is very accurate. The display can be set to Fahrenheit or Celsius. So this is the extreme end of the high temperature range. For something so cheap, they are working remarkably well. So much easier than the ones that hang on the inside.

  • NITRIP Digital Aquarium Thermometer, DC16 LCD Waterproof Temperature Thermometer for Fish Tank
  • With a Large LCD screen: easy to read the temperature at a glance.
  • Very precise: this thermometer is accurate enough to create readings within 0.1 degree.
  • No sensor cable needed, simply attaches to the interior of your aquarium with the suction cup.
  • High and low temperature automatic alarm: default high temperature 28℃, low temperature of 18℃.
  • Wireless with integrated probe and waterproof design, perfect for fish tank or other place.
  • Manufacture: NITRIP
  • Product Dimensions: 1.97 x 1.97 x 1.97 inches; 1.2 Ounces
  • Editor's Impressions Of The Nitrip
  • Thermometer Accuracy [star rating='3.6']
  • Quality [star rating='2.7']
  • Value For Money [star rating='3.6']
  • Affordability [star rating='2.7']

Nitrip Final Thoughts

"I like these."

I bent it a little bit and when I put it back it was perfectly fine. I don't think i'll ever be able to trust a digital thermometer again. One of my aquariums is glass, and the other two are plastic. So much so that I purchased a second set of 6. I have it in both my aquariums now. I used to have a large hang in the side tank that you couldn't miss. I find that the temps are accurate, and this product gives added peace of mind.

Overall Score
3.0

[star rating="3"]
(1 Points)

10. CoZroom LCD Digital Aquarium Thermometer for Fish Tank Water Vivarium Temperature Sensor, Pack of 3,...

User Ratings: 52 15

CoZroom First Impressions

"Just sayin'."

The suction works for a month at a time- in pool and hot tub circulation. I ordered a new one and it works GREAT! I ordered this guy and it was 6 degrees hotter than the digital! I got the second one as a bonus that I'm now using in my old tank. So far, they're all doing their job in my four tanks and I am quite content. I used these to raise chicks, and in my parrot cages. Still a recommendation for me due to price and accuracy.

  • CoZroom LCD Digital Aquarium Thermometer for Fish Tank Water Vivarium Temperature Sensor, Pack of 3, Black
  • Reliable and good-working thermometer for your fish tank or terrarium.
  • Sustains a temperature range of -50℃ - 70℃ and operates within -10℃ - 50℃.
  • The glass aquarium thermometer is designed with a LCD display for easy reading.
  • Works with a high accuracy of 1 degree to set the water at the exact temperature for the fishes and animals.
  • Powered by two button batteries.
  • Manufacture: CoZroom
  • Product Dimensions: 3.54 x 0.79 x 5.12 inches; 0.32 Ounces
  • Batteries: 1 LR44 batteries required. (included)
  • Editor's Impressions Of The CoZroom
  • Thermometer Accuracy [star rating='3.7']
  • Quality [star rating='2.8']
  • Value For Money [star rating='3.7']
  • Affordability [star rating='4.6']

CoZroom Final Thoughts

"Would recommend!"

Ordered three of these and they do the job. However, Lucy at Zacro read this review and emailed me. These digital thermometers are great and there is no guesswork involved. I find that the temps are accurate, and this product gives added peace of mind. He acted aggressively towards it and so I ultimate ended up removing it due to that. The suction will never be the same. You can glue, tape or simply cover the cords in the tank to keep them discreet.

Overall Score
3.8

[star rating="3.8"]
(133 Points)

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