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. Wodwad Stick On Aquarium Fish Tank Glass Greenhouse Thermometer Temperature Gauge Sticker

User Ratings: 55

Wodwad First Impressions

"Highly Recommended."

Put them all in the same tank and they read very close to each other. And I just really started to doubt it. I have kept aquariums for about 45 years. 6F all six took about three minutes to read between 88. This company is taking the long term view of how to do business right. I have always had trouble reading the color temp. I ordered this guy and it was 6 degrees hotter than the digital!

  • Wodwad Stick On Aquarium Fish Tank Glass Greenhouse Thermometer Temperature Gauge Sticker
  • ✤ 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
  • ✤ 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
  • ✤ 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.
  • ✤ The thermometer changes its color according to the surrounding temperature. If the surrounding temperature is 27°C, then the background of scale mark   27°C will turn colorful and other scale marks remain black.
  • ✤ Measurement range: Celsius degree18-34°C, Fahrenheit degree 64-93°F.
  • Manufacture: Wodwad
  • Editor's Impressions Of The Wodwad
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

Wodwad Final Thoughts

"Easy to setup in tank."

And for the price you cant beat it. 49 thermometer that is 100% accurate. It is about 6 inches in length and roughly an inch wide. The plastic from the suction cup quickly turned from a clear to a milky white. Sure enough the digital thermometer was way off by 6 degrees! Good cheap accurate aquarium thermometer. I read some of the 1 star reviews and most of them are not about the product.

Overall Score
4.6


(5 Points)

3. API 2343 Stress Zyme+ Thermometers

API 2343 First Impressions

"Changed to 5-stars now."

Very impressed, I have now had them in used for a month so far. I ordered a new one and it works GREAT! I recommend gluing the suction cups in place where needed for long-term installation. I don't think i'll ever be able to trust a digital thermometer again. I came here to give this product a positive review. Have checked them against the glass thermometers and the accuracy is right on. One extra battery came with each unit.

  • API 2343 Stress Zyme+ Thermometers
  • This product is easy to use
  • This product adds a great Value
  • This product is Manufactured in United States
  • Item Package weight : 7.06 pounds
  • Manufacture: Prime Pet Deals - Code 2
  • Product Dimensions: 9.95 x 7.05 x 2.2 inches; 4 Ounces
  • Editor's Impressions Of The API 2343
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

API 2343 Final Thoughts

"It works great."

He was moving slow in the winter and we realized he needed a heater! 6 in a pack, extra batteries, easy set up, great price. The lid is textured aluminum, and the suction cups don't stick to that. Since adding one of these, it has been much easier to monitor the temp of my tanks. The temperature fluctuated a lot with it. I am extremely pleased with this product. My poor fish was in 86 degrees water for a month.

Overall Score
5.0


(3 Points)

4. 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
  • Quality
  • Value For Money
  • Affordability

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)

5. American Thermal - Aquarium Vertical Thermometer

User Ratings: 63 6

Amercan Thermal BC002004 First Impressions

"Perfect customer service."

Very accurate, have checked it with other thermometers as well. One extra battery came with each unit. This doesn't bother me as it ws so cheap. I had my heater set at 73-degrees and the thermometers showed 74. Set all six probes up in a terrarium with a constant temp of 88. My only complaint is that they tend to be a one time use. So much so that I purchased a second set of 6.

  • American Thermal - Aquarium Vertical Thermometer
  • Accurate.
  • Easy-to-read.
  • Mounts on the outside of your aquarium.
  • New movable thermometer.
  • Vertical.
  • Manufacture: Amercan Thermal
  • Product Dimensions: 6.75 x 5 x 0.13 inches; 0.35 Ounces
  • Editor's Impressions Of The Amercan Thermal BC002004
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

Amercan Thermal BC002004 Final Thoughts

"6 tenths of a degree."

I ordered this guy and it was 6 degrees hotter than the digital! All are pretty accurate within one degree as claimed. Bought the two pack of thermometers. Far more accurate than the usual small glass ones or external LCD strips. This company is taking the long term view of how to do business right. My poor fish was in 86 degrees water for a month. They are within a degree or two of other thermometers I've checked to compare them.

Overall Score
4.3


(83 Points)

6. American Thermal Liquid Crystal Aquarium Thermometer Vertical Small

User Ratings: 72 7

Amer Thermal Instruments BC002021 First Impressions

"Perhaps it's my fault."

I have to admit I had two reasons for buying six. It is always where yo last put it and it is very easy to see and read. The units each had a battery in place and situated for immediate use. These things are useful for a lot besides pet husbandry, too. This thermometer is spot on accurate. The units each had a battery in place and situated for immediate use. 6 in a pack, extra batteries, easy set up, great price.

  • American Thermal Liquid Crystal Aquarium Thermometer Vertical Small
  • Know your aquarium's temperature at a glance
  • Easy-to-read and accurate thermometer mounts on outside of your aquarium
  • Unbreakable, non-corrosive, and non-toxic
  • Fahrenheit scale
  • Manufacture: Amer Thermal Instruments
  • Editor's Impressions Of The Amer Thermal Instruments BC002021
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

Amer Thermal Instruments BC002021 Final Thoughts

"Which is good."

You can glue, tape or simply cover the cords in the tank to keep them discreet. The suction cups work well anywhere I have placed it it has not Fallen. Simple fix, you adjust the thermometer within the suction cup and VIOLA! The digital display itself is easy to read at a glance. I can't say which is the most accurate and don't really care. In the right situation this magnet thermometer is the best available. So versatile, I can read the temperatures literally anywhere.

Overall Score
4.4


(384 Points)

7. Amagle Indoor Digital Thermometer Aquarium Submersible Fish Tank Terrarium LCD Digital Thermometer

User Ratings: 51

Amagle YG_DMH002 First Impressions

"Or left a mark."

I had my heater set at 73-degrees and the thermometers showed 74. 50 thermometers, reads much easier and no suction cup residue, also looks better. One extra battery came with each unit. 89 I could buy Six Thermometers with Six included batteries. The units each had a battery in place and situated for immediate use. 6F all six took about three minutes to read between 88. I can't say which is the most accurate and don't really care.

  • Amagle Indoor Digital Thermometer Aquarium Submersible Fish Tank Terrarium LCD Digital Thermometer
  • Celsius or Fahrenheit selectable
  • Measure both tank and indoor temperature
  • Large LCD display simultaneously showing aquarium & ambient temperature
  • With adhesive tape at back side for easy sticking on aquarium tank
  • Sensor at the back of the thermometer to measure water temperature from glass. Therefore, normally it would measure 1 degree higher than actual water
  • Manufacture: Amagle
  • Item Weight: 1.1 pounds
  • Product Dimensions: 5.51 x 3.15 x 0.39 inches
  • Editor's Impressions Of The Amagle YG_DMH002
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

Amagle YG_DMH002 Final Thoughts

"It's accurate I tell you."

Only thing I don't love is how long the cord is. The digital display is nice and small as well. I have kept aquariums for about 45 years. I ordered this guy and it was 6 degrees hotter than the digital! The units each had a battery in place and situated for immediate use. If the digital display starts to get dim, it's time for a new battery. I got root rot after light leaks and high water temps.

Overall Score
4.0


(3 Points)

8. Digital Aquarium Thermometer

Zoo Med First Impressions

"These are great!"

Water tested with Autidefy brand for two hours. So far I've been very thrilled with these. Since it is a mercury thermometer, it is very accurate. 6F all six took about three minutes to read between 88. So much easier than the ones that hang on the inside. The suction cups work well anywhere I have placed it it has not Fallen. A bit large for anything smaller than 5 gallons, but that's to be expected.

  • Digital Aquarium Thermometer
  • 8.5
  • Manufacture: ZOO MED LABORATORIES
  • Editor's Impressions Of The Zoo Med
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

Zoo Med Final Thoughts

"Great product!"

These digital thermometers are great and there is no guesswork involved. These are the perfect size to be easily read while not being obtrusive. Excellent working for our bearded dragon tank. Then she followed up again on that, asking if they had arrived and were okay. When I set up my newest tank I will be getting another one of these. I just wrote it off as a minor loss. 6 in a pack, extra batteries, easy set up, great price.

Overall Score
3.0


(1 Points)

9. Digital Aquatic Turtle Thermometer

User Ratings: 21 10

Zoo Med TH-26 First Impressions

"Subtracted from the tank."

One of my aquariums is glass, and the other two are plastic. Checked with temp gun and the terrarium was on target at 88. This thermometer is spot on accurate. So much so that I purchased a second set of 6. 6F all six took about three minutes to read between 88. 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.

  • Digital Aquatic Turtle Thermometer
  • DIGITAL AQUATIC TURTLE THERMOMETER
  • 2 PACK
  • AQUARIUM
  • THERMOMETER & HYDROMETER
  • ZOO MED LABORATORIES
  • ZOO MED LABORATORIES
  • DIGITAL AQUATIC TURTLE THERMOMETER
  • AQUARIUM
  • Manufacture: ZOO MED LABORATORIES
  • Item Weight: 2.39 ounces
  • Batteries: 2 Nonstandard Battery batteries required.
  • Editor's Impressions Of The Zoo Med TH-26
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

Zoo Med TH-26 Final Thoughts

"Working wonderfully!"

I'm pretty sure those reviewers have acrylic tanks. It will make you wonder why nobody thought of it before. Very impressed, I have now had them in used for a month so far. I can't say which is the most accurate and don't really care. I came here to give this product a positive review. This is how you calibrate a thermometer. My 50+ eyes cannot read a regular tank thermometer without squinting.

Overall Score
3.2


(6 Points)

10. Thermometer, LCD, Sticks on Outside of Aquarium Tank

User Ratings: 55 45

Carolina Biological Supply Company First Impressions

"It sticks very firmly."

I got root rot after light leaks and high water temps. Good cheap accurate aquarium thermometer. I can't say which is the most accurate and don't really care. At least in the first 3 months of use. So far I've been very thrilled with these. In the right situation this magnet thermometer is the best available. My poor fish was in 86 degrees water for a month.

  • Thermometer, LCD, Sticks on Outside of Aquarium Tank
  • A stick-on thermometer that mounts on outside of tank.
  • The Carolina Pledge: 100% Satisfaction Guaranteed. All of our products are unconditionally guaranteed. If for any reason you are not satisfied with any item, you may return it for a replacement, a refund, or credit. It's that simple.
  • From our beginnings in 1927, Carolina Biological Supply Company has grown to become a leading supplier of science teaching materials for all levels of education. Today, from our headquarters in Burlington, North Carolina, we serve customers worldwide, including teachers, professors, homeschool educators, hobbyists, and professionals in health and science-related fields.
  • When you shop with Carolina, you're not alone! All of our products are backed by unparalleled technical support, available from 8am to 8pm, ET, Monday-Friday. Contact information (Live Chat, email, and phone) is provided after placing your order at Amazon.
  • Manufacture: Carolina Biological Supply Company
  • Editor's Impressions Of The Carolina Biological Supply Company
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

Carolina Biological Supply Company Final Thoughts

"Exactly what I needed."

Very accurate, have checked it with other thermometers as well. 6 inch long Bala Sharks that are known to be very unruly and boisterous. I've checked it against two other thermometers that are accurate. I needed a solution that was not breakable and these do the trick! So far I've been very thrilled with these. So the extra units will always come in handy. So this is the extreme end of the high temperature range.

Overall Score
3.2


(2 Points)

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