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. Honbay 6PCS Adhesive Crystal Digital Temperature Strips Stickers for Fish Tank Water Cup

User Ratings: 70

HONBAY First Impressions

"Never had any problems."

I did have a problem with one in my first pack of 6. For the price I'll probably end up putting these in all of my aquariums. You can not swivle the thermometer to face a certain way. One of my aquariums is glass, and the other two are plastic. It is always where yo last put it and it is very easy to see and read. Simple fix, you adjust the thermometer within the suction cup and VIOLA! Very accurate, have checked it with other thermometers as well.

  • Honbay 6PCS Adhesive Crystal Digital Temperature Strips Stickers for Fish Tank Water Cup
  • Package includes: 6PCS Stick-on Digital Thermometer Strips
  • Material:Plastic
  • Capacity: 13*1.8cm/5.12*0.71inch
  • Perfect for wine bottles, baby bottles, fish tanks, bath water and more, but it can't be used in the environment above 50 ℃.
  • 3 different color, green color represents current temperature, blue color represents a bit lower temperature, brown color represents a bit higher temperature.
  • Manufacture: Honbay
  • Editor's Impressions Of The HONBAY
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

HONBAY Final Thoughts

"Fast accurate readings."

The suction will never be the same. He was moving slow in the winter and we realized he needed a heater! 6F all six took about three minutes to read between 88. It started working as soon as I put it in and has been working ever since. Instead she sent a new package of two, both of which work. For something so cheap, they are working remarkably well. He was moving slow in the winter and we realized he needed a heater!

Overall Score
4.4


(4 Points)

3. 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
  • Quality
  • Value For Money
  • Affordability

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


(20 Points)

4. 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)

5. COOSO Thermometer, 50/110°C Digital LCD Thermometer for Aquarium Freezer Frozen Refrigerator Fridge...

User Ratings: 37

COOSO thermometer First Impressions

"It works great."

Good cheap accurate aquarium thermometer. Put them all in the same tank and they read very close to each other. Still a recommendation for me due to price and accuracy. Very accurate, have checked it with other thermometers as well. It's kind of difficult to hide and keep out of the way. The non-working ones still provide 2 batteries each AND. And I just really started to doubt it.

  • COOSO Thermometer, 50/110°C Digital LCD Thermometer for Aquarium Freezer Frozen Refrigerator Fridge Freezer
  • Cable Length:3.28foot/1meters,Ideal for use in refrigerators,chillers and deep freezes the thermometer has a range of (-122°F-158°F)-50°C to + 70°C,Free switch between Celsius and Fahrenheit
  • Power:1.5v LR44 button cell batteries ( included )
  • Professional Digital Thermometer for Hydroponics & Aquaculture, Amphibian & Reptile Terrariums, Freshwater Tropical Fish & Saltwater Fish Aquariums
  • Real-time monitoring of the temperature of the water, Ideal for aquariums & reptile habitats
  • Do not submerge the LCD display unit under water
  • Manufacture: GUSHU LTD.
  • Product Dimensions: 2.3 x 1.5 x 0.6 inches; 0.63 Ounces
  • Editor's Impressions Of The COOSO thermometer
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

COOSO thermometer Final Thoughts

"Perhaps it's my fault."

Still a recommendation for me due to price and accuracy. I have bought many many temperature gauges for my various fish tanks over the years. It is large enough to see without being obtrusive. One of my aquariums is glass, and the other two are plastic. I needed a solution that was not breakable and these do the trick! I have to admit I had two reasons for buying six. Who knows, whatever it was, it was revolting!

Overall Score
4.4


(2 Points)

6. 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
  • Quality
  • Value For Money
  • Affordability

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


(318 Points)

7. 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
  • Quality
  • Value For Money
  • Affordability

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


(13 Points)

8. uxcell Temperature Gauge Aquarium Thermometer with Probe for Refrigerator 2pcs

uxcell First Impressions

"Not just for aquariums!"

For the price I'll probably end up putting these in all of my aquariums. He was moving slow in the winter and we realized he needed a heater! You can not swivle the thermometer to face a certain way. Instead she sent a new package of two, both of which work. I have it in both my aquariums now. 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.

  • uxcell Temperature Gauge Aquarium Thermometer with Probe for Refrigerator 2pcs
  • Temperature range: -50°C ~ +85°C (-58°F ~ +185°F)
  • Designed to 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: A19010400ux0397
  • Item Weight: 2.89 ounces
  • Size: 2 Piece
  • Power Source: Battery Powered
  • Batteries Required?: No
  • Editor's Impressions Of The uxcell
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

uxcell Final Thoughts

"89 plus free shipping."

These things are useful for a lot besides pet husbandry, too. I removed the batteries of the units I wasn't using right away. He was moving slow in the winter and we realized he needed a heater! Now that the chickens are grown, I have one out in the coop as well. So far, they're all doing their job in my four tanks and I am quite content. A battery can last you up to six months, I'd say, but expect more like three. So the extra units will always come in handy.

Overall Score
3.6


(2 Points)

9. Stick On Thermometer Strip, Digital Temperature Display for Fermenting, Brewing, Wine, Beer, Kombuch...

User Ratings: 75 4

Propagate Pro PPTS1-V First Impressions

"Perfect customer service."

It is always where yo last put it and it is very easy to see and read. It is large enough to see without being obtrusive. Very impressed, I have now had them in used for a month so far. This temperature read a perfect 32 degrees. The extra batteries where very much appreciated and came in handy. He was moving slow in the winter and we realized he needed a heater! I use a small flashlight if I don't want to brighten the area.

  • Stick On Thermometer Strip, Digital Temperature Display for Fermenting, Brewing, Wine, Beer, Kombucha or Aquariums. 50-90F (10-32C) Adhesive Sticker Vertical 5 or 10 Pack (5)
  • 5 or 10 Piece Vertical Set in Resealable Bag - Also in Horizontal Version B07DFW3Z9M
  • Dimensions: 4.75 x 1.0 inch / 120 x 25 mm
  • Measuring range: 10~32 Degree C (50~90 Degree F)
  • Adhesive on the back, just peel off the tape and attach to the outside surface, One time use
  • Color Changing Highly Accurate Temperature Readings
  • Manufacture: Heezy LLC
  • Item Weight: 0.5 ounces
  • Product Dimensions: 4.72 x 1 x 0.1 inches
  • Editor's Impressions Of The Propagate Pro PPTS1-V
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

Propagate Pro PPTS1-V Final Thoughts

"Great price too."

89 I could buy Six Thermometers with Six included batteries. I was using one of those ubiquitous cheap digital thermometers on Amazon. I bent it a little bit and when I put it back it was perfectly fine. I'm pretty sure those reviewers have acrylic tanks. Excellent working for our bearded dragon tank. Simple fix, you adjust the thermometer within the suction cup and VIOLA! I had my heater set at 73-degrees and the thermometers showed 74.

Overall Score
4.6


(592 Points)

10. 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
  • Quality
  • Value For Money
  • Affordability

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


(45 Points)

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