Editor's Choice - Our Favorite API Aquarium Thermometers

1. 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)

2. AUTIDEFY LCD Digital Aquarium Thermometer Fish Tank Water Terrarium Temperature

User Ratings: 63 7

AUTIDEFY First Impressions

"8 C lower than this."

This thermometer is spot on accurate. It is large enough to see without being obtrusive. Bought the two pack of thermometers. The suction works for a month at a time- in pool and hot tub circulation. Very impressed, I have now had them in used for a month so far. 82 PER THERMOMETER with battery included. And for the price you cant beat it.

  • AUTIDEFY LCD Digital Aquarium Thermometer Fish Tank Water Terrarium Temperature
  • Submerge probe into fish tank to measure water temperature (Submerge probe only, do not submerge thermometer in water)
  • Digital °C /° F thermometer;Temperature range -50°c ~ + 70°c,Operating temperature -10°c ~ +50°c
  • Easy to apply suction cup and easy to read LCD screen; Temperature readings to within 0.1 degree
  • Powered by one LR44 button cell (included)
  • Package Contents: 3 x Battery; 3 x Digital Thermometer;3 x Probe
  • Manufacture: AUTIDEFY
  • Editor's Impressions Of The AUTIDEFY
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

AUTIDEFY Final Thoughts

"I must say."

Water tested with Autidefy brand for two hours. For something so cheap, they are working remarkably well. This is my first 5 star review out of many many reviews on Amazon. I was using one of those ubiquitous cheap digital thermometers on Amazon. SIX Digital Thermometers with SIX batteries INCLUDED working so well. I had my heater set at 73-degrees and the thermometers showed 74. Personally I do not mind the way it looks in my aquarium.

Overall Score
4.2


(386 Points)

3. Fluval Submersible Digital Thermometer

User Ratings: 63 12

Fluval 11194 First Impressions

"Perhaps it's my fault."

Very impressed, I have now had them in used for a month so far. My only complaint is that they tend to be a one time use. This thermometer is spot on accurate. So much easier than the ones that hang on the inside. Sure enough the digital thermometer was way off by 6 degrees! I have this thermometer on all my tanks. 6 inch long Bala Sharks that are known to be very unruly and boisterous.

  • Fluval Submersible Digital Thermometer
  • Features a large LED display
  • Fully submersible thermometer
  • Large screen for easy reading
  • Country Of Origin: China
  • Manufacture: Rolf C. Hagen (USA) Corp.
  • Product Dimensions: 1 x 2.6 x 4.9 inches; 0.81 Ounces
  • Editor's Impressions Of The Fluval 11194
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

Fluval 11194 Final Thoughts

"It sticks very firmly."

I needed a solution that was not breakable and these do the trick! I have this thermometer on all my tanks. The suction works for a month at a time- in pool and hot tub circulation. Since it is a mercury thermometer, it is very accurate. My 50+ eyes cannot read a regular tank thermometer without squinting. Ordered three of these and they do the job. I just wrote it off as a minor loss.

Overall Score
3.9


(53 Points)

4. DWSFADA Waterproof Digital Thermometer for Pets,Animal Electronic Thermometer Care Tool Fast Reading...

User Ratings: 68 15

DWSFADA L052579L5U First Impressions

"Would buy again."

Was going to get a floater until I saw this magnetic one! I have it in both my aquariums now. I can't say which is the most accurate and don't really care. So far I've been very thrilled with these. This company is taking the long term view of how to do business right. I ordered this guy and it was 6 degrees hotter than the digital! Since adding one of these, it has been much easier to monitor the temp of my tanks.

  • DWSFADA Waterproof Digital Thermometer for Pets,Animal Electronic Thermometer Care Tool Fast Reading Pet Thermometer 32-43 Degree Veterinary Temperature Indicator in 3-5 Seconds
  • Material: ABS,Size:Approx. 13.5in—2cm/5.3in—0.79inch. Pet temperature readings in celsius.
  • The backlight is very useful and beautiful making everything crystal clear
  • Very suitable for pigs, cattle, cattle, goats, etc
  • Insert the thermometer into the rectum of the animal 5-8 cm and press the on/off button.Start measuring when you hear a click. The measurement ends when a continuous beep is heard
  • If you have any problems with our digital thermometer, please feel free to contact us and we will reply you within 24 hours
  • Manufacture: DWSFADA
  • Product Dimensions: 5.51 x 0.98 x 0.39 inches; 0.95 Ounces
  • Editor's Impressions Of The DWSFADA L052579L5U
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

DWSFADA L052579L5U Final Thoughts

"2-degrees."

Very impressed, I have now had them in used for a month so far. I have to admit I had two reasons for buying six. They reviewed the packaging or shipping by saying it arrived broken. Ambient room temperature measures 72. I needed a solution that was not breakable and these do the trick! And I just really started to doubt it. Then she followed up again on that, asking if they had arrived and were okay.

Overall Score
4.1


(8 Points)

5. Aurynns Pet Thermometer Dog Thermometer, Fast Digital Veterinary Thermometer, Pet Thermometer for Do...

User Ratings: 60 10

AURYNNS EAT-1 First Impressions

"It sticks very firmly."

The digital display is nice and small as well. It started working as soon as I put it in and has been working ever since. My 50+ eyes cannot read a regular tank thermometer without squinting. It is my opinion that everyone should have these that are in the Aquarium Hobby. The non-working ones still provide 2 batteries each AND. Sure enough the digital thermometer was way off by 6 degrees! I tested this in a cup crammed full of ice and some water.

  • Aurynns Pet Thermometer Dog Thermometer, Fast Digital Veterinary Thermometer, Pet Thermometer for Dogs, Cats, Horse,Cattle, Pigs,Birds, Sheep.C/F Switchable
  • Fast Pet Thermometer for all pets. Accurate to within +/- 0.2°F.
  • Measure pets temperature in anus, NOT IN EAR or MOUTH
  • LCD display & Memory function
  • ℃ and °F switchable, easy to read.
  • An alarm will sound if temperature is exceeded.
  • Manufacture: aurynns
  • Product Dimensions: 7.87 x 1.38 x 4.33 inches; 5.89 Ounces
  • Batteries: 2 AAA batteries required. (included)
  • Editor's Impressions Of The AURYNNS EAT-1
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

AURYNNS EAT-1 Final Thoughts

"Subtracted from the tank."

49 thermometer that is 100% accurate. However, Lucy at Zacro read this review and emailed me. When and if we run out of this batch, I'll instantly order another batch. I have to admit I had two reasons for buying six. Ambient room temperature measures 72. They reviewed the packaging or shipping by saying it arrived broken. SIX Digital Thermometers with SIX batteries INCLUDED working so well.

Overall Score
4.2


(138 Points)

6. Marina ThermoSensor In-Out Thermometer

User Ratings: 47 15

Marina 11196 First Impressions

"1 degree of each other."

Have checked them against the glass thermometers and the accuracy is right on. The non-working ones still provide 2 batteries each AND. I guess these units do not like saltwater. I have mine on my 60 gallon cube marine tank. It is about 6 inches in length and roughly an inch wide. This is my first 5 star review out of many many reviews on Amazon. You can use the thermometer with or without the plastic suction cup.

  • Marina ThermoSensor In-Out Thermometer
  • Provides both inside and outside aquarium temperature readings
  • Accurate, easy-to-read digital display
  • Can be attached anywhere on the aquarium
  • Velcro mount for easy installation; Battery included
  • Contains temperature probe
  • Manufacture: Marina
  • Product Dimensions: 0.75 x 3 x 1.5 inches; 1.44 Ounces
  • Batteries: 2 LR44 batteries required. (included)
  • Editor's Impressions Of The Marina 11196
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

Marina 11196 Final Thoughts

"Close enough I reckon!"

So far, they're all doing their job in my four tanks and I am quite content. I removed the batteries of the units I wasn't using right away. So, in those cases, I find it easier to simply replace it. You can not swivle the thermometer to face a certain way. The temperature fluctuated a lot with it. I came here to give this product a positive review. I use a small flashlight if I don't want to brighten the area.

Overall Score
3.7


(66 Points)

7. Zoo Med Analog High Range Reptile Thermometer

User Ratings: 54 12

Zoo Med TH20 First Impressions

"9, and 78."

The only reason I didn't give this 5 stars is because my betta fish didn't like it. Excellent working for our bearded dragon tank. Ordered three of these and they do the job. I used to have a large hang in the side tank that you couldn't miss. I find that the temps are accurate, and this product gives added peace of mind. I find that the temps are accurate, and this product gives added peace of mind. 49 thermometer that is 100% accurate.

  • Zoo Med Analog High Range Reptile Thermometer
  • Velcro backing for easy removal during clean ups
  • Precision German movement
  • A must for high temperature species
  • Manufacture: Zoo Med Laboratories
  • Product Dimensions: 6.5 x 0.3 x 0.2 inches; 1.6 Ounces
  • Editor's Impressions Of The Zoo Med TH20
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

Zoo Med TH20 Final Thoughts

"Perhaps it's my fault."

6 in a pack, extra batteries, easy set up, great price. These are the perfect size to be easily read while not being obtrusive. These are the perfect size to be easily read while not being obtrusive. Still a recommendation for me due to price and accuracy. My only complaint is that they tend to be a one time use. It works equally well on all of them. You dont HAVE to stick the display onto your tank.

Overall Score
3.9


(36 Points)

8. She-love Adhesive Aquarium Thermometer, Fast-Read Thermometer

User Ratings: 23

She-love First Impressions

"No complaints."

50 thermometers, reads much easier and no suction cup residue, also looks better. One extra battery came with each unit. 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. The suction will never be the same. In the right situation this magnet thermometer is the best available. When and if we run out of this batch, I'll instantly order another batch.

  • She-love Adhesive Aquarium Thermometer, Fast-Read Thermometer
  • Big,easy to read digits that tells you, unmistakenly what the temperature is in both Celsius and Fahrenheit degrees. Unlike traditional thermometer that takes forever to figure out where that little red bar in the tube sits. Temperature is accurate up to 1 degree in Celsius and 2 degrees in Fahrenheit
  • Size is just right for any Aquarium
  • 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! No battery and suction cup to worry about
  • Good quality.
  • Size:10cm x 2cm - 3.94inch x 0.79inch
  • Manufacture: She-love
  • Editor's Impressions Of The She-love
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

She-love Final Thoughts

"Which is good."

It is large enough to see without being obtrusive. I have this thermometer on all my tanks. It's kind of difficult to hide and keep out of the way. So this is the extreme end of the high temperature range. 49 thermometer that is 100% accurate. Far more accurate than the usual small glass ones or external LCD strips. One of my aquariums is glass, and the other two are plastic.

Overall Score
3.5


(5 Points)

9. Dimart Boyu Bt-08 Premium Aquarium Digital Thermometer Digital Thermostat Oven Thermometer Thermosta...

Dimart First Impressions

"Exactly what I needed."

Put them all in the same tank and they read very close to each other. Since it is a mercury thermometer, it is very accurate. The units each had a battery in place and situated for immediate use. I had my heater set at 73-degrees and the thermometers showed 74. I ordered a new one and it works GREAT! Since adding one of these, it has been much easier to monitor the temp of my tanks. Have checked them against the glass thermometers and the accuracy is right on.

  • Dimart Boyu Bt-08 Premium Aquarium Digital Thermometer Digital Thermostat Oven Thermometer Thermostat Thermometer with Probe Vehicle Fish Tank Aquarium Refrigerator Embedded (Black)
  • Wireless with integrated probe for easy use.
  • Ideal for Aquarium or terrarium temperature monitoring
  • Easy-to-read LCD displays temperature in Fahrenheit or Celsius
  • Enjoy convenient monitoring of parameters essential to Fish and reptile health
  • Best choice for your home fish tank & aquariums.
  • Manufacture: Dimart
  • Editor's Impressions Of The Dimart
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

Dimart Final Thoughts

"Currently maintains a 76."

I just wrote it off as a minor loss. In this scenario it would probably get knocked loose a lot. I am extremely pleased with this product. 50 thermometers, reads much easier and no suction cup residue, also looks better. Then she followed up again on that, asking if they had arrived and were okay. So, in those cases, I find it easier to simply replace it. So far I've been very thrilled with these.

Overall Score
5.0


(2 Points)

10. 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)

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