Editor's Choice - Our Favorite Glass Aquarium Thermometers

1. Aquarium Thermometer, Digital Fish Tank Thermometer with Large LCD Display Touch Screen, Stick-on Ta...

User Ratings: 75 4

capetsma First Impressions

"They are within 0."

I have always had trouble reading the color temp. These digital thermometers are great and there is no guesswork involved. Sure enough the digital thermometer was way off by 6 degrees! Good cheap accurate aquarium thermometer. Was going to get a floater until I saw this magnetic one! It will make you wonder why nobody thought of it before. You can not swivle the thermometer to face a certain way.

  • Aquarium Thermometer, Digital Fish Tank Thermometer with Large LCD Display Touch Screen, Stick-on Tank Temperature Sensor Ensures Accurate Reading for Aquarium Terrarium Amphibians & Reptiles
  • Cordless & Touch Screen Design : no probes or messy wires in water and backside temperature sensor stick on the outside glass of the fish tank prevent water infiltration and electronic Oxidation, Large Crystal Touch Screen makes it easier to read the temperature far away, stands out among other aquarium thermometers.
  • Large numbers on 3.2" Large Transparent Screen : 3.2" large glass screen is larger than most of the thermometers, large temperature display on transparent screen, will not block your view.
  • Accurate Display : With an accurate temperature sensor stick on the surface of the fish tank, this Digital aquarium thermometer will display temperature for fish tank, reading from 0°C to 70°C / 32°F - 158°F, accurate to 0.1°
  • Easy to Operate : pull down the black battery cover below the screen, insert the battery, close it, stick and read the tank temperature. Press "up" or "down" to switch °C / °F
  • Widely used : 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.
  • Manufacture: capetsma
  • Product Dimensions: 2.99 x 0.28 x 2.99 inches; 3.21 Ounces
  • Batteries: 2 CR2 batteries required. (included)
  • Editor's Impressions Of The capetsma
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

capetsma Final Thoughts

"These are great!"

So, in those cases, I find it easier to simply replace it. I was using one of those ubiquitous cheap digital thermometers on Amazon. Ambient room temperature measures 72. I guess these units do not like saltwater. The extra batteries where very much appreciated and came in handy. I have it in both my aquariums now. I was using one of those ubiquitous cheap digital thermometers on Amazon.

Overall Score
4.5


(1678 Points)

Peoples Choice - Other Highly Rated Glass Aquarium Thermometers

2. Fluval Edge Digital Aquarium Thermometer

User Ratings: 68 6

Fluval 11206 First Impressions

"Suction cups are okay."

I've checked it against two other thermometers that are accurate. 6 inch long Bala Sharks that are known to be very unruly and boisterous. Works well in my betta tank, but provide a couple hours for it to read temp changes. When and if we run out of this batch, I'll instantly order another batch. You dont HAVE to stick the display onto your tank. Instead she sent a new package of two, both of which work. This company is taking the long term view of how to do business right.

  • Fluval Edge Digital Aquarium Thermometer
  • accurate and easy-to-read thermometer
  • mounts easily on outside of glass
  • ideal for fresh and saltwater tanks
  • temperature range of 64 to 86 degrees fahrenheit
  • Age range description: All ranges
  • Manufacture: Fluval
  • Product Dimensions: 0.2 x 2.9 x 7 inches; 0.16 Ounces
  • Editor's Impressions Of The Fluval 11206
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

Fluval 11206 Final Thoughts

"2-degrees."

I just wrote it off as a minor loss. My poor fish was in 86 degrees water for a month. Then is started to give a low reading, and it is not reading the correct temperature. Now that the chickens are grown, I have one out in the coop as well. 6F all six took about three minutes to read between 88. I've checked it against two other thermometers that are accurate. All were Close enough for a fish tank and other uses.

Overall Score
4.3


(948 Points)

3. capetsma Reptile Thermometer, Digital Thermometer Hygrometer for Reptile Terrarium, Temperature and ...

User Ratings: 67 2

capetsma First Impressions

"Doing the math."

It works equally well on all of them. I tested this in a cup crammed full of ice and some water. I bent it a little bit and when I put it back it was perfectly fine. 6 inch long Bala Sharks that are known to be very unruly and boisterous. He acted aggressively towards it and so I ultimate ended up removing it due to that. The suction will never be the same. So far, they're all doing their job in my four tanks and I am quite content.

  • capetsma Reptile Thermometer, Digital Thermometer Hygrometer for Reptile Terrarium, Temperature and Humidity Monitor in Acrylic and Glass Terrarium,Accurate - Easy to Read - No Messy Wires…
  • Manufacture: capetsma
  • Product Dimensions: 2.09 x 1.3 x 0.59 inches; 1.45 Ounces
  • Batteries: 1 LR44 batteries required. (included)
  • Editor's Impressions Of The capetsma
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

capetsma Final Thoughts

"Love it for my turtles."

Love it, it's easy to read and keeps an accurate temp. So much so that I purchased a second set of 6. I have mine on my 60 gallon cube marine tank. I ordered this guy and it was 6 degrees hotter than the digital! Set all six probes up in a terrarium with a constant temp of 88. Sure enough the digital thermometer was way off by 6 degrees! I've checked it against two other thermometers that are accurate.

Overall Score
4.4


(200 Points)

4. BOYU BT-01 Glass Thermometer for Aquarium

User Ratings: 55 20

BOYU BT-01 First Impressions

"LOVE these thermometers."

One being a very expensive digital. You can use the thermometer with or without the plastic suction cup. So far, they're all doing their job in my four tanks and I am quite content. I have to admit I had two reasons for buying six. So far I've been very thrilled with these. This doesn't bother me as it ws so cheap. However, Lucy at Zacro read this review and emailed me.

  • BOYU BT-01 Glass Thermometer for Aquarium
  • Easy-to-read floating thermometer with suction cups
  • Includes a safety zone indicator
  • Ensures your aquarium is at a proper temperature
  • Celsius or Fahrenheit options
  • Manufacture: Tin Tin Trading Inc.
  • Product Dimensions: 1 x 1 x 4.5 inches; 0.64 Ounces
  • Editor's Impressions Of The BOYU BT-01
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

BOYU BT-01 Final Thoughts

"Very easy to read."

6 in a pack, extra batteries, easy set up, great price. Ambient room temperature measures 72. If the digital display starts to get dim, it's time for a new battery. I've checked it against two other thermometers that are accurate. A bit large for anything smaller than 5 gallons, but that's to be expected. The temperature fluctuated a lot with it. One being a very expensive digital.

Overall Score
3.7


(161 Points)

Honorable Mentions - More Top Selling Glass Aquarium Thermometers

5. 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
  • Quality
  • Value For Money
  • Affordability

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


(133 Points)

6. Dr. Marine Glass Saltwater Hydrometer Thermometer Reef Soft Coral

User Ratings: 65 9

Aquarium Equip SU First Impressions

"6 tenths of a degree."

These are the perfect size to be easily read while not being obtrusive. You can not swivle the thermometer to face a certain way. The non-working ones still provide 2 batteries each AND. I am extremely pleased with this product. I have mine on my 60 gallon cube marine tank. These are the perfect size to be easily read while not being obtrusive. You can not swivle the thermometer to face a certain way.

  • Dr. Marine Glass Saltwater Hydrometer Thermometer Reef Soft Coral
  • Ensures proper gravity of aquarium water. Easy to use.
  • Ensures all water has the same salinity within aquarium
  • Green indicators are ideal range of water temperature and specific gravity for most salt water / marine aquariums.
  • Measure both Temperature and Specific Gravity of the water.
  • SIZE:19.2CM(7.5"). Glass Hydrometer; Measures Celsius and Fahrenheit
  • Manufacture: SU
  • Product Dimensions: 8.1 x 0.8 x 0.8 inches; 0.96 Ounces
  • Editor's Impressions Of The Aquarium Equip SU
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

Aquarium Equip SU Final Thoughts

"Great product!"

A battery can last you up to six months, I'd say, but expect more like three. You can use the thermometer with or without the plastic suction cup. So the extra units will always come in handy. So far I've been very thrilled with these. 6F all six took about three minutes to read between 88. Works well in my betta tank, but provide a couple hours for it to read temp changes. So far, they're all doing their job in my four tanks and I am quite content.

Overall Score
4.2


(100 Points)

7. 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
  • Quality
  • Value For Money
  • Affordability

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


(89 Points)

8. MECO(TM) Aquarium Glass Hydrometer Fish Tank Water Temperature Thermometer Salt Marine

User Ratings: 50 18

MECO Co. First Impressions

"Fish and me happy."

And for the price you cant beat it. I don't think they are backlit but for the price they are still nice. When I set up my newest tank I will be getting another one of these. So far I've been very thrilled with these. You dont HAVE to stick the display onto your tank. I don't think they are backlit but for the price they are still nice. Personally I do not mind the way it looks in my aquarium.

  • MECO(TM) Aquarium Glass Hydrometer Fish Tank Water Temperature Thermometer Salt Marine
  • Easy accurate readings for aquariums.
  • Green color indicates both ideal temperature and salinity.
  • Reads °C and °F Temperature in ¨H(40-100) and ¡æ(0-40).
  • Measure both Temperature and Specific Gravity of the water.
  • Green indicators are ideal range of water temperature and specific gravity for most salt water/ marine aquariums.
  • Manufacture: MECO Co.,LTD
  • Editor's Impressions Of The MECO Co.
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

MECO Co. Final Thoughts

"It's accurate I tell you."

I ordered a new one and it works GREAT! 2 deg, if it was 32, it would be a SOLID block of ice. All are pretty accurate within one degree as claimed. Good cheap accurate aquarium thermometer. They reviewed the packaging or shipping by saying it arrived broken. I bent it a little bit and when I put it back it was perfectly fine. I can't say which is the most accurate and don't really care.

Overall Score
3.9


(74 Points)

9. Suisaku Magnetic Glass Thermometer L (L)

User Ratings: 59 7

Suisaku First Impressions

"Easy to setup in tank."

So much so that I purchased a second set of 6. 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. Now I'm getting back in on a much smaller scale with 3 gallon Acrylic Nano tanks. They are within a degree or two of other thermometers I've checked to compare them. I was using one of those ubiquitous cheap digital thermometers on Amazon. 82 PER THERMOMETER with battery included.

  • Suisaku Magnetic Glass Thermometer L (L)
  • Magnetic attachment
  • Large Display
  • Slim Profile
  • Less than 11 cm (4.33 inches) in length
  • Manufacture: Suisaku
  • Product Dimensions: 0.39 x 0.39 x 4.92 inches; 0.78 Ounces
  • Editor's Impressions Of The Suisaku
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

Suisaku Final Thoughts

"So far so good."

For the price I'll probably end up putting these in all of my aquariums. So far, they're all doing their job in my four tanks and I am quite content. The suction cups work well anywhere I have placed it it has not Fallen. Bought the two pack of thermometers. You can use the thermometer with or without the plastic suction cup. The temperature fluctuated a lot with it. The digital display itself is easy to read at a glance.

Overall Score
4.1


(70 Points)

10. Lomodo 4 Pack Floating Thermometer Aquarium Glass Temperature Gauge with Suction Cup for Fish Tank

User Ratings: 63 12

Lomodo First Impressions

"Works perfect."

I got the second one as a bonus that I'm now using in my old tank. 2 deg, if it was 32, it would be a SOLID block of ice. Bought the two pack of thermometers. Good cheap accurate aquarium thermometer. At least in the first 3 months of use. Set all six probes up in a terrarium with a constant temp of 88. I have kept aquariums for about 45 years.

  • Lomodo 4 Pack Floating Thermometer Aquarium Glass Temperature Gauge with Suction Cup for Fish Tank
  • Ideal for fish tank, aquariums, suitable for indoor and outdoor use, ensuring proper water temperature
  • The red indicator allows you to easily read the temperature
  • Green safety zone quickly indicates whether the water temperature is normal
  • Equipped with suction cups, it can either float on water or suck on glass walls
  • Easy to use: just put it in your pool, pond, fish tank, etc. and it will get you the water temperature
  • Manufacture: Lomodo
  • Editor's Impressions Of The Lomodo
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

Lomodo Final Thoughts

"Very accurate."

Checked with temp gun and the terrarium was on target at 88. It will make you wonder why nobody thought of it before. The units each had a battery in place and situated for immediate use. Good cheap accurate aquarium thermometer. Just BE CAREFUL WHEN ADJUSTING, IT IS GLASS AND WILL BREAK. He acted aggressively towards it and so I ultimate ended up removing it due to that. This temperature read a perfect 32 degrees.

Overall Score
4.0


(61 Points)

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