Editor's Choice - Our Favorite VIVOSUN Aquarium Thermometers
1. VIVOSUN 1-Pack LCD Digital Aquarium Thermometer Fish Tank Water Terrarium Temperature with Suction C...
User Ratings: 73 3
VIVOSUN First Impressions
"Fish and me happy."The display can be set to Fahrenheit or Celsius. I have kept aquariums for about 45 years. The plastic from the suction cup quickly turned from a clear to a milky white. My poor fish was in 86 degrees water for a month. Very accurate, have checked it with other thermometers as well. I was using one of those ubiquitous cheap digital thermometers on Amazon. Put them all in the same tank and they read very close to each other.
- VIVOSUN 1-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 78.74 inch (2 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='3.8']
- Quality [star rating='5']
- Value For Money [star rating='4']
- Affordability [star rating='5']
VIVOSUN Final Thoughts
"So we are ordering more."He was moving slow in the winter and we realized he needed a heater! Who knows, whatever it was, it was revolting! I removed the batteries of the units I wasn't using right away. I used to have a large hang in the side tank that you couldn't miss. 49 thermometer that is 100% accurate. At least in the first 3 months of use. The temperature fluctuated a lot with it.
Overall Score
4.6
(1062 Points)

Peoples Choice - Other Highly Rated VIVOSUN Aquarium Thermometers
2. VIVOSUN 4-Pack LCD Digital Aquarium Thermometer Fish Tank Water Terrarium Temperature with Suction C...
User Ratings: 69 3
VIVOSUN First Impressions
"Appears to be accurate."This is how you calibrate a thermometer. So much easier than the ones that hang on the inside. It is about 6 inches in length and roughly an inch wide. I used these on a number of my aquariums that have discus fish in them. In the right situation this magnet thermometer is the best available. I just wrote it off as a minor loss. Ambient room temperature measures 72.
- VIVOSUN 4-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 78.74 inch (2 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='3.7']
- Quality [star rating='3.8']
- Value For Money [star rating='4.3']
- Affordability [star rating='4.7']
VIVOSUN Final Thoughts
"These are great!"50 thermometers, reads much easier and no suction cup residue, also looks better. The digital display itself is easy to read at a glance. So far I've been very thrilled with these. They reviewed the packaging or shipping by saying it arrived broken. It is about 6 inches in length and roughly an inch wide. The suction cups work well anywhere I have placed it it has not Fallen. I'm pretty sure those reviewers have acrylic tanks.
Overall Score
4.5
(627 Points)

3. 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
(512 Points)

Here Are Some Other Related Aquarium Thermometers
4. SUKRAGRAHA Traditional Stick-on Aquarium Thermometers Temperature Strip Degree Fahrenheit Celsius Di...
User Ratings: 64 8
SUKRAGRAHA First Impressions
"Exactly what I needed."I have always had trouble reading the color temp. 6F all six took about three minutes to read between 88. Personally I do not mind the way it looks in my aquarium. I got root rot after light leaks and high water temps. Who knows, whatever it was, it was revolting! I find that the temps are accurate, and this product gives added peace of mind. You dont HAVE to stick the display onto your tank.
- SUKRAGRAHA Traditional Stick-on Aquarium Thermometers Temperature Strip Degree Fahrenheit Celsius Display 10 pc (64~93F Not for Fever)
- 10 pcs Set
- Dimensions: 5.12 x 0.71 inch / 13.0 x 1.8 cm
- Measuring range: 64~93 Degree F (18~34 Degree C)
- Adhesive by the back, just peel off the tape and attach to outside /surface of aquarium
- Different temperature with different color
- Manufacture: SUKRAGRAHA
- Editor's Impressions Of The SUKRAGRAHA
- Thermometer Accuracy [star rating='3.4']
- Quality [star rating='3.6']
- Value For Money [star rating='3.8']
- Affordability [star rating='4.8']
SUKRAGRAHA Final Thoughts
"I opened the first three."You can glue, tape or simply cover the cords in the tank to keep them discreet. Only thing I don't love is how long the cord is. I did have a problem with one in my first pack of 6. I bent it a little bit and when I put it back it was perfectly fine. These digital thermometers are great and there is no guesswork involved. The only reason I didn't give this 5 stars is because my betta fish didn't like it. So the extra units will always come in handy.
Overall Score
4.3
(1078 Points)

5. 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
(262 Points)

6. Towashine Fish Tank Thermometer U Shape Hanging on Temperature Monitor Gauge for 6mm Thick Glass Aqu...
Towashine First Impressions
"And he is a betta."89 I could buy Six Thermometers with Six included batteries. I used these on a number of my aquariums that have discus fish in them. I don't think i'll ever be able to trust a digital thermometer again. This doesn't bother me as it ws so cheap. Place it on your aquarium and you are good to go. This thermometer is spot on accurate. When and if we run out of this batch, I'll instantly order another batch.
- Towashine Fish Tank Thermometer U Shape Hanging on Temperature Monitor Gauge for 6mm Thick Glass Aquarium
- U shape design is convenient to use and you can hang it on fish tank, no need suction cup
- Fit for 6mm thickness glass fish tank, 5.9" in length
- Temperature range from 0℃ to 40℃
- Made of high quality glass and easy to read accurate numbers
- Great for fresh water and salt water
- Manufacture: Towashine
- Product Dimensions: 5.91 x 0.02 x 0.02 inches; 1.23 Ounces
- Editor's Impressions Of The Towashine
- Thermometer Accuracy [star rating='4.1']
- Quality [star rating='4.6']
- Value For Money [star rating='2.7']
- Affordability [star rating='3.6']
Towashine Final Thoughts
"Great price too."I have it in both my aquariums now. This company is taking the long term view of how to do business right. I can't say which is the most accurate and don't really care. I read some of the 1 star reviews and most of them are not about the product. We are using them to measure various temperatures inside and outside of a motorhome. I have to admit I had two reasons for buying six. The non-working ones still provide 2 batteries each AND.
Overall Score
3.6
(2 Points)

7. 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 [star rating='4.9']
- Quality [star rating='4.1']
- Value For Money [star rating='4.4']
- Affordability [star rating='3.9']
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)

8. POPETPOP Pet Dog Thermometer Digital - LCD Waterproof Electronic Portable Vetinary Thermometer for D...
User Ratings: 29 22
POPETPOP J17LR51I0OV0P449AW15T0F First Impressions
"I like the product."Ordered three of these and they do the job. Set all six probes up in a terrarium with a constant temp of 88. At least in the first 3 months of use. My poor fish was in 86 degrees water for a month. If the digital display starts to get dim, it's time for a new battery. They are within a degree or two of other thermometers I've checked to compare them. Since it is a mercury thermometer, it is very accurate.
- POPETPOP Pet Dog Thermometer Digital - LCD Waterproof Electronic Portable Vetinary Thermometer for Dog Puppy Cats Rabbits Kittens Sheep Celsius Only
- Animal Thermometer Waterproof rubber probe, flexible, soft tactility more comfortabe.
- Soft sensor, measurement accuracy, LCD display and waterproof.
- Suitable for your farm animal, pigs, cattle, sheep, etc.
- Directions for use: Insert the thermometer soft head position rectal 5-8 cm, press the switch (ON/OFF) button, hear di after start measuring, when they hear continuous di... After the measurement end. 20-40 seconds out thermometer, view the measurement results, according to the switch key to clos
- Cat temperature thermometer made of high quality ABS material, practical, durable and safe.
- Manufacture: POPETPOP
- Product Dimensions: 4.72 x 1.18 x 0.79 inches; 0.71 Ounces
- Editor's Impressions Of The POPETPOP J17LR51I0OV0P449AW15T0F
- Thermometer Accuracy [star rating='3.8']
- Quality [star rating='3.9']
- Value For Money [star rating='3.9']
- Affordability [star rating='2.7']
POPETPOP J17LR51I0OV0P449AW15T0F Final Thoughts
"And he is a betta."Simple fix, you adjust the thermometer within the suction cup and VIOLA! Just BE CAREFUL WHEN ADJUSTING, IT IS GLASS AND WILL BREAK. When I set up my newest tank I will be getting another one of these. Works well in my betta tank, but provide a couple hours for it to read temp changes. So much easier than the ones that hang on the inside. I had my heater set at 73-degrees and the thermometers showed 74. The digital display itself is easy to read at a glance.
Overall Score
3.2
(32 Points)

9. 20 Pieces Digital Temperature Sticker Adhesive Thermometer Strip Aquarium Thermometer Sticker Temper...
User Ratings: 72 9
BBTO First Impressions
"9, and 78."In the right situation this magnet thermometer is the best available. Bought the two pack of thermometers. Excellent working for our bearded dragon tank. Bought the two pack of thermometers. One of my aquariums is glass, and the other two are plastic. Water tested with Autidefy brand for two hours. The digital display itself is easy to read at a glance.
- 20 Pieces Digital Temperature Sticker Adhesive Thermometer Strip Aquarium Thermometer Sticker Temperature Thermometer Strips in Degree Fahrenheit and Celsius Display for Fish Tank and Aquarium
- Package quantity: there are 20 pieces digital temperature sticker in the package, enough quantity to meet your long time using and use for different occasions; The adhesive temperature strip measure approx. 13 x 2 cm/ 5.1 x 0.8 in in length and width, proper size to fit most surfaces
- Easy to stick: our aquarium thermometer sticker features adhesive design, just peel off the tape and attach to surface of aquarium, fish tank and others; After about 2 to 5 minutes, the colored change will indicate the exact temperature; Please keep it away from any heat source
- Easy to read: the fish tank thermometer strip has 3 colored marking that can indicate the temperature situation, which can change with the water temperature, each color represents different water temperature condition, they can be seen clearly and quickly from the surface
- Monitor temperature: our digital temperature sticker is suitable for monitor temperature of fish tank and aquarium, can keep fishes, shrimps, reptiles or turtles comfortable by making sure the water isn't too hot or too cold; Also can be applied to measure the temperature of your DIY drinks and wine barrel, terrarium and any sort of pet tank
- Measuring range: the stick-on digital temperature strip measures both Fahrenheit and Celsius degree, Celsius degree in the range of 18 to 34 °C, and Fahrenheit degree in the range of 64 to 93 °F
- Manufacture: BBTO
- Editor's Impressions Of The BBTO
- Thermometer Accuracy [star rating='4.9']
- Quality [star rating='3.7']
- Value For Money [star rating='4.4']
- Affordability [star rating='4.8']
BBTO Final Thoughts
"Love this product!"A bit large for anything smaller than 5 gallons, but that's to be expected. The plastic from the suction cup quickly turned from a clear to a milky white. 6F all six took about three minutes to read between 88. The only reason I didn't give this 5 stars is because my betta fish didn't like it. The units each had a battery in place and situated for immediate use. The suction will never be the same. I did have a problem with one in my first pack of 6.
Overall Score
4.4
(43 Points)

10. Imagitarium Aquarium Strip Thermometer, Small
User Ratings: 39
Imagitarium THM-008 First Impressions
"Super easy."The extra batteries where very much appreciated and came in handy. It is easy to use and install it'disappears' in your tank it is so unobtrusive. Set all six probes up in a terrarium with a constant temp of 88. The non-working ones still provide 2 batteries each AND. I use a small flashlight if I don't want to brighten the area. Was going to get a floater until I saw this magnetic one! I tested this in a cup crammed full of ice and some water.
- Imagitarium Aquarium Strip Thermometer, Small
- Aquarium Strip Thermometer from Imagitarium
- Adheres to the outside of glass or acrylic fish tanks for an easy and secure instillation
- Measures in Celsius and Fahrenheit
- Uses easy-to-read measurements
- Ideal for freshwater or saltwater fish tanks
- Manufacture: Imagitarium
- Item Weight: 0.32 ounces
- Editor's Impressions Of The Imagitarium THM-008
- Thermometer Accuracy [star rating='4.2']
- Quality [star rating='4.4']
- Value For Money [star rating='3']
- Affordability [star rating='4.1']
Imagitarium THM-008 Final Thoughts
"I opened the first three."The display can be set to Fahrenheit or Celsius. I have to admit I had two reasons for buying six. And I just really started to doubt it. The only reason I didn't give this 5 stars is because my betta fish didn't like it. If the digital display starts to get dim, it's time for a new battery. Since it is a mercury thermometer, it is very accurate. Checked with temp gun and the terrarium was on target at 88.
Overall Score
4.0
(3 Points)
