Editor's Choice - Our Favorite BOYU Aquarium Thermometers

1. 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)

2. 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)

3. GuDoQi 4 Pack Mini Digital Electronic Thermometer Hygrometer LCD Mini Temperature Monitor Humidity M...

User Ratings: 54 12

GuDoQi First Impressions

"And he is a betta."

You can not swivle the thermometer to face a certain way. They reviewed the packaging or shipping by saying it arrived broken. One extra battery came with each unit. So versatile, I can read the temperatures literally anywhere. I have always had trouble reading the color temp. They reviewed the packaging or shipping by saying it arrived broken. 6 inch long Bala Sharks that are known to be very unruly and boisterous.

  • GuDoQi 4 Pack Mini Digital Electronic Thermometer Hygrometer LCD Mini Temperature Monitor Humidity Meter Gauge Digital Display for Reptile Incubator Fridge,Garden,Cellar Outdoor Indoor
  • Large LCD screen (3.57 x 1.68cm / 1.41 x 0.67inch) with big digits for easy reading in the distance
  • Compact size (1.9 x 1.1 x 0.6inch) and lightweight (17.9g/0.04lb), easy to carry in your pocket or car
  • Temperature range: -50°C ~ 70°C, humidity range: 10% ~ 99%, temperature accuracy: ±1°C (under normal temperature)
  • Professional thermo-hygrometer to measure temperature and humidity accurately (ONLY display temperature in Celsius)
  • Perfect to use in bedroom, living room, office, library, aquarium, incubator, brooders, reptile tank, greenhouse etc
  • Manufacture: QBY
  • Batteries: 2 LR44 batteries required. (included)
  • Editor's Impressions Of The GuDoQi
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

GuDoQi Final Thoughts

"Changed to 5-stars now."

I've checked it against two other thermometers that are accurate. Simple fix, you adjust the thermometer within the suction cup and VIOLA! Ordered three of these and they do the job. We are using them to measure various temperatures inside and outside of a motorhome. 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. I bought these for my dwc reservoirs.

Overall Score
4.0


(80 Points)

4. Qguai Aquarium Thermometer, C/F Switch LCD Digital Fish Tank Thermometer with Large Clear Screen, Mo...

User Ratings: 70 6

Qguai First Impressions

"Very easy to read."

I have always had trouble reading the color temp. It is about 6 inches in length and roughly an inch wide. It is easy to use and install it'disappears' in your tank it is so unobtrusive. The display can be set to Fahrenheit or Celsius. So much easier than the ones that hang on the inside. So the extra units will always come in handy. The temperature fluctuated a lot with it.

  • Qguai Aquarium Thermometer, C/F Switch LCD Digital Fish Tank Thermometer with Large Clear Screen, Monitor Water Terrarium Temperature, No Messy Wires in Your Saltwater Freshwater and Reef Aquarium.
  • Simple and Sleek Aquarium Thermometer: Digital number display on large clear screen ensures you to read current temperature quickly and accurately without any blind zone. no probe or messy wires in water reduce electronic component aging problem.
  • Accurately monitor water temperature in Fahrenheit or Celsius: Just press “up” or “down” to switch C / F, and this temperature thermometer will display reading from 0C to 70C / 32F - 158F with precision backside temperature probe stick on the fish tank, it is accurate to 0.1.
  • Easy to set up safe zone: This Self-adhensive fish tank thermometer is powered by CR2032 (included), you just need to tear down the film and stick it to the outside of your fish tank. Specially made insulative tape is easy to remove and will not leave any stain on your fish tank.
  • Wide application: Suitable for different water types such as fresh water, tap water, salt water, marine water, can be used as terrarium thermometer to monitor the living temperature for reptile such as lizard, turtle.
  • Our Fish Aquarium Thermometer is backed by 6 Month Warranty. Contact us if you have any problem.
  • Manufacture: Qguai
  • Batteries: 2 Product Specific batteries required. (included)
  • Editor's Impressions Of The Qguai
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

Qguai Final Thoughts

"Would buy again."

Ordered three of these and they do the job. This temperature read a perfect 32 degrees. Good cheap accurate aquarium thermometer. The display can be set to Fahrenheit or Celsius. I had my heater set at 73-degrees and the thermometers showed 74. However, Lucy at Zacro read this review and emailed me. All were Close enough for a fish tank and other uses.

Overall Score
4.4


(244 Points)

5. AoE Performance Aquarium Fish Tank Vertical Thermometer

User Ratings: 53 8

AoE Performance AOE THERM2 First Impressions

"Fish and me happy."

I just wrote it off as a minor loss. They are within a degree or two of other thermometers I've checked to compare them. I got root rot after light leaks and high water temps. So the extra units will always come in handy. 82 PER THERMOMETER with battery included. A bit large for anything smaller than 5 gallons, but that's to be expected. And for the price you cant beat it.

  • AoE Performance Aquarium Fish Tank Vertical Thermometer
  • Accurate range is from 18 C to 34 C
  • Temperature range of the aquarium is shown in both Fahrenheit and Celcius
  • Self adhesive backing
  • Manufacture: AoE Performance
  • Editor's Impressions Of The AoE Performance AOE THERM2
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

AoE Performance AOE THERM2 Final Thoughts

"I like this."

One being a very expensive digital. Just BE CAREFUL WHEN ADJUSTING, IT IS GLASS AND WILL BREAK. The temperature fluctuated a lot with it. I've checked it against two other thermometers that are accurate. Was going to get a floater until I saw this magnetic one! Checked with temp gun and the terrarium was on target at 88. I used these to raise chicks, and in my parrot cages.

Overall Score
4.0


(75 Points)

6. 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)

7. HTYX Veterinary Thermometer Animal Pet Anus Thermometer Accurate and Durable Waterproof Fever Fast D...

HTYX First Impressions

"Very easy to read."

When and if we run out of this batch, I'll instantly order another batch. Put them all in the same tank and they read very close to each other. The plastic from the suction cup quickly turned from a clear to a milky white. I tested this in a cup crammed full of ice and some water. I got the second one as a bonus that I'm now using in my old tank. I have kept aquariums for about 45 years. 49 thermometer that is 100% accurate.

  • HTYX Veterinary Thermometer Animal Pet Anus Thermometer Accurate and Durable Waterproof Fever Fast Digital Veterinary Supplies Precision Waterproof 10pcs
  • More accurate: Mercury measurement is more accurate, and small changes in body temperature increase the amplitude of the mercury column in the glass tube
  • PV protection: more sturdy casing protection to avoid bumps, each one is equipped with a casing to better protect the thermometer and not easy to break
  • Easy reading: large scale, easy reading, the elderly can clearly see the number of readings, read the value
  • Convenient and durable: convenient temperature measurement, direct temperature measurement, can be used by animals, easy to use, can be used repeatedly
  • 100% satisfaction, we value the customer's purchase experience very much, if you have any questions, we will answer within 24 hours
  • Manufacture: HTYX
  • Editor's Impressions Of The HTYX
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

HTYX Final Thoughts

"Currently maintains a 76."

This doesn't bother me as it ws so cheap. Sure enough the digital thermometer was way off by 6 degrees! All were Close enough for a fish tank and other uses. It worked great and I highly recommend it! One extra battery came with each unit. I think the people who said the suction cup broke. The only reason I didn't give this 5 stars is because my betta fish didn't like it.

Overall Score
4.0


(1 Points)

8. RISERPO LCD Digital Aquarium Thermometer for Fish Tank, Marine, Reptiles, Insects, Lizard, Terrarium...

User Ratings: 63 7

RISEPRO TM-4 First Impressions

"So glad i got these!"

So this is the extreme end of the high temperature range. So far, they're all doing their job in my four tanks and I am quite content. I think the people who said the suction cup broke. Was going to get a floater until I saw this magnetic one! The suction works for a month at a time- in pool and hot tub circulation. I just wrote it off as a minor loss. For something so cheap, they are working remarkably well.

  • RISERPO LCD Digital Aquarium Thermometer for Fish Tank, Marine, Reptiles, Insects, Lizard, Terrarium, Bath and etc
  • EASY TO SETUP – RISEPRO® aquarium thermometer can easily be set in minutes. Simple mount main display unit over the tank! And place the sensor probe inside the water!
  • WIDE RANGE & ACCURATE – Measure -58.0 to 158.0 degree Fahrenhit (-50.0 to 70.0 degree Celsius) with accuracy +/- 1 degree Celsius
  • TEMPERAURE UNITS – Easy switch between degree Celsius and Fahrenhit
  • WIDE VARIETY OF AQUARIUM AND WATER TANKS – Suitable for different water types such as fresh water, tap water, salty water, marine water and etc.
  • GREAT FOR REPTILE – Suitable for monitoring the living temperature for reptile such as lizard, turtle etc.
  • LCD display with remote submersible sensor probe
  • Compact design with 2 suction cup mounts
  • Switch between °C and °F
  • Manufacture: RISEPRO
  • Product Dimensions: 2.3 x 0.6 x 1.5 inches; 0.8 Ounces
  • Batteries: 1 Lithium ion batteries required. (included)
  • Editor's Impressions Of The RISEPRO TM-4
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

RISEPRO TM-4 Final Thoughts

"These are great!"

In the right situation this magnet thermometer is the best available. I guess these units do not like saltwater. This thermometer is spot on accurate. Place it on your aquarium and you are good to go. So versatile, I can read the temperatures literally anywhere. I used to have a large hang in the side tank that you couldn't miss. I don't think they are backlit but for the price they are still nice.

Overall Score
4.3


(284 Points)

9. Smarttemp Thermometer

User Ratings: 68

SMARTTEMP THERMOMETER First Impressions

"Fish and me happy."

It is large enough to see without being obtrusive. I've checked it against two other thermometers that are accurate. I got the second one as a bonus that I'm now using in my old tank. Place it on your aquarium and you are good to go. He acted aggressively towards it and so I ultimate ended up removing it due to that. It is large enough to see without being obtrusive. 6 inch long Bala Sharks that are known to be very unruly and boisterous.

  • Smarttemp Thermometer
  • SMARTTEMP THERMOMETER, 2 PACK, AQUARIUM, THERMOMETER & HYDROMETER, JW PET COMPANY
  • SMARTTEMP THERMOMETER
  • AQUARIUM
  • Saltwater safe.
  • Pack of 2
  • Manufacture: JW - AQUATIC
  • Product Dimensions: 3 x 3 x 3 inches; 3.2 Ounces
  • Editor's Impressions Of The SMARTTEMP THERMOMETER
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

SMARTTEMP THERMOMETER Final Thoughts

"Or left a mark."

Still a recommendation for me due to price and accuracy. The lid is textured aluminum, and the suction cups don't stick to that. Now if it falls into a sink full of water, it's not a problem. It's kind of difficult to hide and keep out of the way. Water tested with Autidefy brand for two hours. I used these on a number of my aquariums that have discus fish in them. They are within a degree or two of other thermometers I've checked to compare them.

Overall Score
4.5


(10 Points)

10. Inkbird C929A Smart Digital WiFi Temperature Controller for Aquarium Fish Tank Wireless Thermostat f...

User Ratings: 48 13

Inkbird First Impressions

"They all were within."

He acted aggressively towards it and so I ultimate ended up removing it due to that. Now I'm getting back in on a much smaller scale with 3 gallon Acrylic Nano tanks. 6 in a pack, extra batteries, easy set up, great price. The units each had a battery in place and situated for immediate use. This little wonder allows me to see at a glance that everything is as it should be. Very accurate, have checked it with other thermometers as well. This thermometer is spot on accurate.

  • Inkbird C929A Smart Digital WiFi Temperature Controller for Aquarium Fish Tank Wireless Thermostat for Reptiles Terrarium
  • Equipped with 2 probes measure the temperature,double protection from overheating,peace in mind.
  • WiFi & APP remote monitor & control, get alarms of high/low-temperature or errors from APP & device
  • Easy to set up, plug and play, pre-wired and compatible with 110V heaters or fans.1200W max
  • Alarms if the Temperature difference is over 5℉, or continuous heating time exceeds expectations
  • Built-in dual relays enable power off when one of the relays is defective, overheated is prevent
  • Manufacture: Lerway Tech
  • Product Dimensions: 3.54 x 1.18 x 2.48 inches; 7.83 Ounces
  • Editor's Impressions Of The Inkbird
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

Inkbird Final Thoughts

"Easy to setup in tank."

It worked great and I highly recommend it! You can glue, tape or simply cover the cords in the tank to keep them discreet. So far I've been very thrilled with these. I'm pretty sure those reviewers have acrylic tanks. Was going to get a floater until I saw this magnetic one! The plastic from the suction cup quickly turned from a clear to a milky white. I have always had trouble reading the color temp.

Overall Score
3.9


(30 Points)

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