Editor's Choice - Our Favorite Coralife Aquarium Thermometers

1. Coralife 00232 Digital Thermometer

User Ratings: 50 10

Coralife 100105032 First Impressions

"Great price."

I used to have a large hang in the side tank that you couldn't miss. We are using them to measure various temperatures inside and outside of a motorhome. The non-working ones still provide 2 batteries each AND. I used these on a number of my aquariums that have discus fish in them. I've checked it against two other thermometers that are accurate. Excellent working for our bearded dragon tank. If the digital display starts to get dim, it's time for a new battery.

  • Coralife 00232 Digital Thermometer
  • Attaches to aquarium via small suction cup
  • 3 foot long temperature probe for large size aquariums
  • Battery included
  • Ideal for aquariums and terrariums
  • Readings to 0.1-degrees Fahrenheit or Celsius
  • Manufacture: Central Garden & Pet
  • Product Dimensions: 6.3 x 0.4 x 1.9 inches; 1.6 Ounces
  • Editor's Impressions Of The Coralife 100105032
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

Coralife 100105032 Final Thoughts

"I like these."

I removed the batteries of the units I wasn't using right away. Bought the two pack of thermometers. Good cheap accurate aquarium thermometer. The plastic from the suction cup quickly turned from a clear to a milky white. It is always where yo last put it and it is very easy to see and read. The non-working ones still provide 2 batteries each AND. All are pretty accurate within one degree as claimed.

Overall Score
3.8


(230 Points)

2. JLENOVEG Reptile Thermometer with Alarm Function Reptile Thermometer Reptile Digital Alarm Thermomet...

User Ratings: 57 5

JLENOVEG First Impressions

"8 C lower than this."

This is my first 5 star review out of many many reviews on Amazon. Instead she sent a new package of two, both of which work. When and if we run out of this batch, I'll instantly order another batch. My poor fish was in 86 degrees water for a month. Far more accurate than the usual small glass ones or external LCD strips. These things are useful for a lot besides pet husbandry, too. Then she followed up again on that, asking if they had arrived and were okay.

  • JLENOVEG Reptile Thermometer with Alarm Function Reptile Thermometer Reptile Digital Alarm Thermometer Reptile Tank Hygrometer with Hook Temperature Humidity Meter for Reptile Tanks, Terrariums
  • Essential Alarm Reptile Thermometer Hygrometer: Monitor temperature and humidity of tanks with this easy to use thermometer hygrometer. Default Alarm arrange: 28 degree (HI); 18 degree (Lo), it can be set by yourself. And pls note: it will only alarm few seconds, then the alarm value will flashing.
  • Stylish Design: Stylish looking digital thermometer with hook for temperature and humidity monitoring. Easy to read, install and operate; this gadget features a digital screen that displays reading in both Fahrenheit and Celsius
  • Fantastic Value to Help Maintain Ideal Environment: While caring for your beloved reppies, temperature plays a quintessential role; When it comes to reptile tanks, we only offer the best quality and accuracy. Reptile Digital Thermometer allows you to closely monitor the right temperature
  • Quality Guaranteed and Accurate Temperature Measurement: Our carefully sourced range of thermometer hygrometers are manufactured to the highest of standards our customers expect
  • Exceptional Customer Service: With size of only 2.44” x 1.57” x 0.66”(62×40×17mm), this can be displayed anywhere in your tank without getting in the way of your pal’s view. With a wealth of experience our Thermometer World teams are here to help with any questions.
  • Manufacture: Poly
  • Batteries: 1 LR44 batteries required. (included)
  • Editor's Impressions Of The JLENOVEG
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

JLENOVEG Final Thoughts

"No complaints so far!"

This is my first 5 star review out of many many reviews on Amazon. I can't say which is the most accurate and don't really care. It is my opinion that everyone should have these that are in the Aquarium Hobby. The extra batteries where very much appreciated and came in handy. Now I'm getting back in on a much smaller scale with 3 gallon Acrylic Nano tanks. 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.

Overall Score
4.3


(39 Points)

3. Jardin Submersible LCD Digital Aquarium Waterproof Thermometer, Blue

User Ratings: 32 16

JARDIN a09052900ux0034 First Impressions

"These are great!"

It is about 6 inches in length and roughly an inch wide. Good cheap accurate aquarium thermometer. I've checked it against two other thermometers that are accurate. I removed the batteries of the units I wasn't using right away. Then is started to give a low reading, and it is not reading the correct temperature. So much so that I purchased a second set of 6. I've checked it against two other thermometers that are accurate.

  • Jardin Submersible LCD Digital Aquarium Waterproof Thermometer, Blue
  • It is attached by pressing suction cup onto the surface of the aquarium
  • Blue Aquarium Thermometer uses 1 x LR44 cell button battery
  • Dimension: 4.5(L x W x H)cm
  • Weight: 38g
  • Package Included:1 x Blue Aquarium Thermometer
  • Manufacture: Dragonmarts Co. Ltd. / Uxcell
  • Product Dimensions: 1.77 x 0.87 x 1.18 inches; 1.44 Ounces
  • Editor's Impressions Of The JARDIN a09052900ux0034
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

JARDIN a09052900ux0034 Final Thoughts

"I like the product."

The non-working ones still provide 2 batteries each AND. It is about 6 inches in length and roughly an inch wide. Personally I do not mind the way it looks in my aquarium. The extra batteries where very much appreciated and came in handy. The suction will never be the same. This thermometer is spot on accurate. It worked great and I highly recommend it!

Overall Score
3.3


(71 Points)

4. SunGrow Shrimp Stick-on Thermometer, 5.2 Inches, Precise Temperature Monitoring, Keeps Shrimps Healt...

User Ratings: 60 10

SunGrow First Impressions

"Versatile."

You can not swivle the thermometer to face a certain way. Was going to get a floater until I saw this magnetic one! I'm pretty sure those reviewers have acrylic tanks. My poor fish was in 86 degrees water for a month. I had my heater set at 73-degrees and the thermometers showed 74. We are using them to measure various temperatures inside and outside of a motorhome. One of my aquariums is glass, and the other two are plastic.

  • SunGrow Shrimp Stick-on Thermometer, 5.2 Inches, Precise Temperature Monitoring, Keeps Shrimps Healthy, Optimal Water Temperature Promotes Longer Lifespan, Stick-and-Go, Easy to Read, Use and Install
  • ✔ PROVIDES SHRIMPS A FEEL OF THEIR NATURAL HABITAT --- For freshwater crustaceans, it is important to maintain warm temperature in their environment. Unsuitable environment can cause your shrimp to become sluggish, tired and inactive. Stick-on Thermometer by SunGrow will help keep an eye on your tank’s temperature to avoid such circumstances from occurring.
  • ✔ KEEPS DECAPODS HEALTHY --- Once you spot your beloved shrimps losing their vibrance and feeling weak, there is something not right. It is vital to maintain your tank’s temperature at the right level. As a conscientious pet owner, you can significantly reduce their stress levels with the right temperature. Consequently, it will help them to digest and metabolize food properly thus protecting them against possible maladies.
  • ✔ PRECISE TEMPERATURE MONITORING --- Shrimp need water that is between 65 and 80 degrees Fahrenheit to survive. If it drops below 65°F, it slows down their metabolism and they will feel very weak. This easy-to-use thermometer changes the color indicator to green and blue to indicate the tank temperature.
  • ✔ SIMPLE TO READ AND EASY INSTALLATION --- Measures 5.2” tall by 0.7” wide (13cm x 1.8cm), this Stick-on is so easy to attach. Simply peel and stick ! Its design is minimalist, it is all black with measurements on white color for an easy temperature reading. The blue highlight reflects a temperature below the tank’s actual temperature of the tank and green highlight reflects the real temperature of the tank.
  • ✔ GUARANTEES HAPPY ENVIRONMENT & LONGEVITY OF SHRIMPS --- These freshwater pets are at their happiest in proper environment. They are more active, productive and are definitely healthy when optimal water conditions are provided to them. Properly maintained environment can make your shrimps live to their maximum potential.
  • Manufacture: Luffy Pets Collection
  • Editor's Impressions Of The SunGrow
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

SunGrow Final Thoughts

"Easy set up."

Simple fix, you adjust the thermometer within the suction cup and VIOLA! And is easily hidden behind a plant. It's kind of difficult to hide and keep out of the way. He acted aggressively towards it and so I ultimate ended up removing it due to that. For something so cheap, they are working remarkably well. This temperature read a perfect 32 degrees. 6 inch long Bala Sharks that are known to be very unruly and boisterous.

Overall Score
4.0


(26 Points)

5. Polarbear's Pet Shop New! Digital LCD Aquarium Fish Thermometer Water Terrarium Black Free Batteries...

Polarbear's Pet Shop First Impressions

"Which is good."

As you can see from my photos, in both°F and°C, all six are within. It is my opinion that everyone should have these that are in the Aquarium Hobby. These are the perfect size to be easily read while not being obtrusive. We are using them to measure various temperatures inside and outside of a motorhome. They are within a degree or two of other thermometers I've checked to compare them. I bent it a little bit and when I put it back it was perfectly fine. And is easily hidden behind a plant.

  • Polarbear's Pet Shop New! Digital LCD Aquarium Fish Thermometer Water Terrarium Black Free Batteries
  • LCD display
  • Switch between °C and °F
  • Press ''FSW'' for 3 seconds to power off
  • Temperature Range: -50 °C ~ +70°C
  • Cable length: approx. 3 feet
  • Manufacture: Polarbear's Pet Shop
  • Editor's Impressions Of The Polarbear's Pet Shop
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

Polarbear's Pet Shop Final Thoughts

"They all were within."

Put them all in the same tank and they read very close to each other. 2 deg, if it was 32, it would be a SOLID block of ice. So this is the extreme end of the high temperature range. He acted aggressively towards it and so I ultimate ended up removing it due to that. You can glue, tape or simply cover the cords in the tank to keep them discreet. I have kept aquariums for about 45 years. The units each had a battery in place and situated for immediate use.

Overall Score
5.0


(1 Points)

6. Digital Mini Automatic LCD Aquarium Fish Tank Food Feeder Timer up to 4 Feeding Times + High Accurac...

User Ratings: 27 24

hossen B008R6NWOU First Impressions

"LOVE these thermometers."

I think the people who said the suction cup broke. I bent it a little bit and when I put it back it was perfectly fine. I bought these for my dwc reservoirs. So far I've been very thrilled with these. Now I'm getting back in on a much smaller scale with 3 gallon Acrylic Nano tanks. Works well in my betta tank, but provide a couple hours for it to read temp changes. I did have a problem with one in my first pack of 6.

  • Digital Mini Automatic LCD Aquarium Fish Tank Food Feeder Timer up to 4 Feeding Times + High Accuracy Submersible Aquarium Index Thermometer
  • Made in China
  • Package height :12.1 cm
  • Package length :8.0 cm
  • Package width :11.1 cm
  • Manufacture: hossen
  • Product Dimensions: 4.8 x 3.15 x 4.41 inches; 6.4 Ounces
  • Batteries: 2 AAA batteries required.
  • Editor's Impressions Of The hossen B008R6NWOU
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

hossen B008R6NWOU Final Thoughts

"This is perfect."

These things are useful for a lot besides pet husbandry, too. You can use the thermometer with or without the plastic suction cup. And I just really started to doubt it. Instead she sent a new package of two, both of which work. 2 deg, if it was 32, it would be a SOLID block of ice. The extra batteries where very much appreciated and came in handy. Very impressed, I have now had them in used for a month so far.

Overall Score
3.3


(165 Points)

7. AUTIDEFY LCD Digital Aquarium Thermometer Fish Tank Water Terrarium Temperature (2Pack+10Pack)

User Ratings: 50 11

AUTIDEFY First Impressions

"Only thing the battries."

In this scenario it would probably get knocked loose a lot. Water tested with Autidefy brand for two hours. For the price I'll probably end up putting these in all of my aquariums. One of my aquariums is glass, and the other two are plastic. I got root rot after light leaks and high water temps. It is my opinion that everyone should have these that are in the Aquarium Hobby. I can't say which is the most accurate and don't really care.

  • AUTIDEFY LCD Digital Aquarium Thermometer Fish Tank Water Terrarium Temperature (2Pack+10Pack)
  • Submerge probe into fish tank to measure water temperature (Submerge probe only, do not submerge thermometer in water)
  • LED Digital °C /° F thermometer;Temperature range -50°c ~ + 70°c,Operating temperature -10°c ~ +50°c
  • Sticker Thermometer Dimensions: 5.12” tall by 0.7” wide (13cm x 1.8cm)
  • Adhesive on the back, just peel off the tape and attach to the outside surface.
  • Package Contents: 2 x Digital Thermometer; 10 x Stick-on Thermometer
  • Manufacture: AUTIDEFY
  • Editor's Impressions Of The AUTIDEFY
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

AUTIDEFY Final Thoughts

"Drop in the probe."

The digital display is nice and small as well. The only reason I didn't give this 5 stars is because my betta fish didn't like it. So much easier than the ones that hang on the inside. Still a recommendation for me due to price and accuracy. It will make you wonder why nobody thought of it before. And I just really started to doubt it. And I just really started to doubt it.

Overall Score
3.8


(25 Points)

8. Abnaok Salinity Tester, Sea Specific Gravity Test for Fish Tank Pond Water Saltwater Freshwater, Acc...

User Ratings: 68 14

Abnaok First Impressions

"Great price too."

So far, they're all doing their job in my four tanks and I am quite content. It worked great and I highly recommend it! So versatile, I can read the temperatures literally anywhere. I can't say which is the most accurate and don't really care. The lid is textured aluminum, and the suction cups don't stick to that. So versatile, I can read the temperatures literally anywhere. As you can see from my photos, in both°F and°C, all six are within.

  • Abnaok Salinity Tester, Sea Specific Gravity Test for Fish Tank Pond Water Saltwater Freshwater, Accurate Automatic Hydrometer
  • Safe Material:Made of plastic,aquarium clear Automatic Accurate Readable SaltWater Hydrometer.
  • Durable Clear Acrylic:Accurate, durable, and easy to read your marine aquarium's salt level and specific gravity,Small and waterproof.if the specific gravity between 1.000 - 1.019,show that the specific gravity is small;if the specific gravity between 1.020 - 1.023,show that the specific gravity is nomal;if the specific gravity between 1.024 - 1.030,show that the specific gravity is big;
  • Clearly Safe Zone Indicated:Includes solinity and specific grovity scales.The outside rang of scale indicates salinity(PPT).The inside range of scale indicates gravity.And with safe zone clearly indicated.Range of use: 0-40 degrees (1.000-1.030).If the salinity ppt between 32 - 40,show that the salinity hydrometer is high;If the salinity ppt between 27 - 31,show that the salinity hydrometer is normal; If the salinity ppt between 0 - 26,show that the salinity hydrometer is light.
  • Wide Usage:Fit for brackish and marine aquariums.Perfect for testing both salinity and specific gravity of your brackish and marine tank.Includes solinity and specific grovity scales.Suitable for fresh water and sea water.
  • Easy to Read and Use:The easy-to-read swing-arm pointer and extra wide stable base provide an accurate test result.
  • Manufacture: Abnaok
  • Editor's Impressions Of The Abnaok
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

Abnaok Final Thoughts

"They are within 0."

The units each had a battery in place and situated for immediate use. My poor fish was in 86 degrees water for a month. I have it in both my aquariums now. 6 inch long Bala Sharks that are known to be very unruly and boisterous. For the price I'll probably end up putting these in all of my aquariums. I just wrote it off as a minor loss. I think the people who said the suction cup broke.

Overall Score
4.1


(8 Points)

9. uxcell Temperature Gauge Aquarium Thermometer Celsius with Probe for Fish Tank 3pcs

User Ratings: 69

uxcell First Impressions

"Currently maintains a 76."

Then is started to give a low reading, and it is not reading the correct temperature. Water tested with Autidefy brand for two hours. One of my aquariums is glass, and the other two are plastic. 6 in a pack, extra batteries, easy set up, great price. Personally I do not mind the way it looks in my aquarium. So this is the extreme end of the high temperature range. Now that the chickens are grown, I have one out in the coop as well.

  • uxcell Temperature Gauge Aquarium Thermometer Celsius with Probe for Fish Tank 3pcs
  • 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: A19010400ux0395
  • Item Weight: 3.45 ounces
  • Size: 3 Piece
  • Power Source: Battery Powered
  • Batteries Required?: No
  • Editor's Impressions Of The uxcell
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

uxcell Final Thoughts

"All you need."

It is my opinion that everyone should have these that are in the Aquarium Hobby. I read some of the 1 star reviews and most of them are not about the product. My only complaint is that they tend to be a one time use. This company is taking the long term view of how to do business right. SIX Digital Thermometers with SIX batteries INCLUDED working so well. Far more accurate than the usual small glass ones or external LCD strips. I have this thermometer on all my tanks.

Overall Score
4.1


(4 Points)

10. SUKRAGRAHA Traditional Stick-on Aquarium Thermometers Temperature Strip Celsius Fahrenheit Display 1...

User Ratings: 72 5

SUKRAGRAHA First Impressions

"Love this product!"

This temperature read a perfect 32 degrees. I got root rot after light leaks and high water temps. I'm pretty sure those reviewers have acrylic tanks. These things are useful for a lot besides pet husbandry, too. I have mine on my 60 gallon cube marine tank. The display can be set to Fahrenheit or Celsius. I read some of the 1 star reviews and most of them are not about the product.

  • SUKRAGRAHA Traditional Stick-on Aquarium Thermometers Temperature Strip Celsius Fahrenheit Display 10 pc (18~34C Not for Fever)
  • 10 pcs Set
  • Dimensions: 5.12 x 0.71 inch / 13.0 x 1.8 cm
  • Measuring range: 18~34 Degree C (64~93 Degree F)
  • 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
  • Quality
  • Value For Money
  • Affordability

SUKRAGRAHA Final Thoughts

"Great price."

It is my opinion that everyone should have these that are in the Aquarium Hobby. The digital display itself is easy to read at a glance. 6 in a pack, extra batteries, easy set up, great price. I removed the batteries of the units I wasn't using right away. It is always where yo last put it and it is very easy to see and read. 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.

Overall Score
4.5


(325 Points)

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