Editor's Choice - Our Favorite Penn-Plax Aquarium Thermometers

1. Penn-Plax Standing Thermometer

User Ratings: 49

Penn-Plax TS First Impressions

"Which is good."

So the extra units will always come in handy. The suction works for a month at a time- in pool and hot tub circulation. Now if it falls into a sink full of water, it's not a problem. It is large enough to see without being obtrusive. Place it on your aquarium and you are good to go. And I just really started to doubt it. I had my heater set at 73-degrees and the thermometers showed 74.

  • Penn-Plax Standing Thermometer
  • Standing Style Glass Aquarium Thermometer
  • Accurate Easy To Read
  • This Product Is Made In China
  • Package Dimensions: 0.6" L X 3.1" W X 7.4" H
  • Manufacture: Penn Plax, INC.
  • Product Dimensions: 0.6 x 3.1 x 7.4 inches; 0.8 Ounces
  • Editor's Impressions Of The Penn-Plax TS
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

Penn-Plax TS Final Thoughts

"Close enough I reckon!"

I recommend gluing the suction cups in place where needed for long-term installation. A bit large for anything smaller than 5 gallons, but that's to be expected. I use a small flashlight if I don't want to brighten the area. My poor fish was in 86 degrees water for a month. The only reason I didn't give this 5 stars is because my betta fish didn't like it. So this is the extreme end of the high temperature range. Just BE CAREFUL WHEN ADJUSTING, IT IS GLASS AND WILL BREAK.

Overall Score
4.3


(13 Points)

Peoples Choice - Other Highly Rated Penn-Plax Aquarium Thermometers

2. Penn-Plax Stainless Steel Thermometer

User Ratings: 52 25

Penn-Plax 54537105 First Impressions

"Only thing the battries."

I don't think they are backlit but for the price they are still nice. I have mine on my 60 gallon cube marine tank. Since it is a mercury thermometer, it is very accurate. One of my aquariums is glass, and the other two are plastic. Personally I do not mind the way it looks in my aquarium. This temperature read a perfect 32 degrees. I find that the temps are accurate, and this product gives added peace of mind.

  • Penn-Plax Stainless Steel Thermometer
  • Penn-Plax is committed to creating and manufacturing innovative pet products
  • Penn Plax is a name that stands for Quality Innovation and Integrity
  • Experience a great line of Pet Products
  • Manufacture: Pro-Motion Distributing - Direct
  • Product Dimensions: 5 x 2 x 4 inches; 0.71 Ounces
  • Editor's Impressions Of The Penn-Plax 54537105
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

Penn-Plax 54537105 Final Thoughts

"Fast accurate readings."

Simple fix, you adjust the thermometer within the suction cup and VIOLA! You can use the thermometer with or without the plastic suction cup. One extra battery came with each unit. It is my opinion that everyone should have these that are in the Aquarium Hobby. So the extra units will always come in handy. A battery can last you up to six months, I'd say, but expect more like three. Excellent working for our bearded dragon tank.

Overall Score
3.6


(3 Points)

3. Penn Plax PP37201 Digital Aquarium Thermometer

User Ratings: 60

Penn-Plax First Impressions

"So far loving it."

So the extra units will always come in handy. The digital display itself is easy to read at a glance. In the right situation this magnet thermometer is the best available. Works well in my betta tank, but provide a couple hours for it to read temp changes. He acted aggressively towards it and so I ultimate ended up removing it due to that. The lid is textured aluminum, and the suction cups don't stick to that. I bought these for my dwc reservoirs.

  • Penn Plax PP37201 Digital Aquarium Thermometer
  • Clear numbers for easy readings
  • Displays Fahrenheit and Celsius temperatures
  • Pressure-sensitive backing mounts outside of tank
  • Manufacture: Penn Plax
  • Editor's Impressions Of The Penn-Plax
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

Penn-Plax Final Thoughts

"Great for price."

This doesn't bother me as it ws so cheap. You can glue, tape or simply cover the cords in the tank to keep them discreet. I have to admit I had two reasons for buying six. I have kept aquariums for about 45 years. I just wrote it off as a minor loss. I read some of the 1 star reviews and most of them are not about the product. Since it is a mercury thermometer, it is very accurate.

Overall Score
4.6


(3 Points)

4. STEBCECE 9Pcs Brine Shrimp Incubator DIY Aquarium Hatching System Cap Connection Tee Regulator Hose ...

User Ratings: 51 49

STEBCECE First Impressions

"These are great!"

Set all six probes up in a terrarium with a constant temp of 88. All were Close enough for a fish tank and other uses. Good cheap accurate aquarium thermometer. Put them all in the same tank and they read very close to each other. It is always where yo last put it and it is very easy to see and read. In this scenario it would probably get knocked loose a lot. It will make you wonder why nobody thought of it before.

  • STEBCECE 9Pcs Brine Shrimp Incubator DIY Aquarium Hatching System Cap Connection Tee Regulator Hose Check Cultivation Kit for Ornamental Fish
  • ❋Easy to use, convenient to Hatch.
  • ❋Simple, practical, convenient to hatch shrimp for feeding fish.
  • ❋Can be directly into the harvest shrimp eggs, sea salt and water
  • ❋Connect with air p ump, eggs can be hatched within 24 hours .
  • ❋Good for the shrimp egg to feed the ornamental fish larvae.
  • Manufacture: STEBCECE
  • Item Weight: 1.98 Ounces
  • Editor's Impressions Of The STEBCECE
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

STEBCECE Final Thoughts

"So we are ordering more."

Water tested with Autidefy brand for two hours. The display can be set to Fahrenheit or Celsius. Then she followed up again on that, asking if they had arrived and were okay. Water tested with Autidefy brand for two hours. I don't think they are backlit but for the price they are still nice. Only thing I don't love is how long the cord is. It is easy to use and install it'disappears' in your tank it is so unobtrusive.

Overall Score
3.0


(3 Points)

5. Marina Aqua-Minder Programmable Digital Thermometer

User Ratings: 60 11

Marina 11190 First Impressions

"Sticks easy."

Good cheap accurate aquarium thermometer. I removed the batteries of the units I wasn't using right away. I ordered this guy and it was 6 degrees hotter than the digital! Love it, it's easy to read and keeps an accurate temp. 49 thermometer that is 100% accurate. It works equally well on all of them. The non-working ones still provide 2 batteries each AND.

  • Marina Aqua-Minder Programmable Digital Thermometer
  • Provides continuous monitoring of temperature
  • Six programmable English tasks
  • Measures 32 degrees Fahrenheit to 199 degrees Fahrenheit
  • Ideal for people with busy schedules
  • For better product understanding please refer to the back of the product
  • Manufacture: Marina
  • Product Dimensions: 0.9 x 4.9 x 8 inches; 3.2 Ounces
  • Editor's Impressions Of The Marina 11190
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

Marina 11190 Final Thoughts

"Perhaps it's my fault."

2 deg, if it was 32, it would be a SOLID block of ice. I can't say which is the most accurate and don't really care. It is easy to use and install it'disappears' in your tank it is so unobtrusive. Very impressed, I have now had them in used for a month so far. However, Lucy at Zacro read this review and emailed me. I think the people who said the suction cup broke. The suction will never be the same.

Overall Score
4.0


(37 Points)

6. Fenleo Aquarium LCD Digital Thermometer Fish Tank Water Terrarium Temperature

Fenleo Aquarium First Impressions

"Works perfect."

It's kind of difficult to hide and keep out of the way. One extra battery came with each unit. The units each had a battery in place and situated for immediate use. It will make you wonder why nobody thought of it before. My only complaint is that they tend to be a one time use. 6 inch long Bala Sharks that are known to be very unruly and boisterous. 2 deg, if it was 32, it would be a SOLID block of ice.

  • Fenleo Aquarium LCD Digital Thermometer Fish Tank Water Terrarium Temperature
  • ♥Large, easy to read LCD display. Compact design for discrete use
  • ♥Temperature range -50 degree Celsius~ + 110 degree Celsius; Cable length: approx. 3.3 feet
  • ♥Powered by one LR44 button cell (included)
  • ♥Application: Aquarium, Indoor, Refrigerator, Human Body, Car, CPU Heat Diffuser
  • ♥Submerge probe into fish tank to measure water temperature (Submerge probe only, do not submerge thermometer in water)
  • Manufacture: Lingsun Tech
  • Editor's Impressions Of The Fenleo Aquarium
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

Fenleo Aquarium Final Thoughts

"6 tenths of a degree."

He acted aggressively towards it and so I ultimate ended up removing it due to that. My poor fish was in 86 degrees water for a month. The digital display is nice and small as well. In the right situation this magnet thermometer is the best available. I have this thermometer on all my tanks. I ordered this guy and it was 6 degrees hotter than the digital! Was going to get a floater until I saw this magnetic one!

Overall Score
4.0


(1 Points)

7. Zacro LCD Digital Aquarium Thermometer Fish Tank Water Terrarium Temperature

User Ratings: 74 3

Zacro FBA_ZDT1-AUX-1 First Impressions

"I like this."

I have kept aquariums for about 45 years. For something so cheap, they are working remarkably well. So the extra units will always come in handy. One of my aquariums is glass, and the other two are plastic. It works equally well on all of them. Personally I do not mind the way it looks in my aquarium. My only complaint is that they tend to be a one time use.

  • Zacro LCD Digital Aquarium Thermometer Fish Tank Water Terrarium Temperature
  • Small volume, large function: The size of thermometer is 2.17 x 1.46 in. Our thermometer is suitable for different water types such as fresh water, tap water, salty water, marine water and etc.
  • Convenient: You can choose seither Fahrenheit or Celsius according to your need. What's more, each thermometer is equipped with a LR44 battery.
  • Show clearly temperature: You can read the temperature data clearly in the LCD screen. Please note that the thermometer reading has about 1 degree deviation.
  • Easy to use: Submerge probe into fish tank to measure water temperature (Submerge probe only, do not submerge thermometer in water).
  • Temperature range: -50 degree Celsius~ + 70 degree Celsius; Operating temperature: -10 degree Celsius~ +50 degree Celsius.
  • Manufacture: Zacro
  • Editor's Impressions Of The Zacro FBA_ZDT1-AUX-1
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

Zacro FBA_ZDT1-AUX-1 Final Thoughts

"7 reading."

The lid is textured aluminum, and the suction cups don't stick to that. 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 recommend gluing the suction cups in place where needed for long-term installation. Now I'm getting back in on a much smaller scale with 3 gallon Acrylic Nano tanks. For the price I'll probably end up putting these in all of my aquariums. All were Close enough for a fish tank and other uses.

Overall Score
4.5


(4472 Points)

8. Genuine Pavia Rectal Temp Veterinary Thermometer for Dogs, Cats, Horses, Pets and Livestock. Accurat...

Pavia Rectal Temp Veterinary Thermometer First Impressions

"89 plus free shipping."

Now if it falls into a sink full of water, it's not a problem. One of my aquariums is glass, and the other two are plastic. These digital thermometers are great and there is no guesswork involved. The non-working ones still provide 2 batteries each AND. The units each had a battery in place and situated for immediate use. As you can see from my photos, in both°F and°C, all six are within. For the price I'll probably end up putting these in all of my aquariums.

  • Genuine Pavia Rectal Temp Veterinary Thermometer for Dogs, Cats, Horses, Pets and Livestock. Accurate Temps in Only 6 Seconds. Beeps When Ready. Trusted by Veterinarians, Breeders and Pet Owners.
  • PAVIA VETERINARY THERMOMETER: Fast, accurate rectal temps in as quick as 6 seconds. Used in veterinary clinics the world over, now available direct to kennels, rescues, shelters, breeders and pet owners everywhere.
  • FAST AND ACCURATE: Stable, accurate temperature readings in as quick as 6 seconds. Accurate to within +/- 0.2°F. Beeps when ready.
  • VERSATILE &ERGONOMIC: The small-diameter, 3-inch-long probe enables temperature taking of any size animal. Designed for easy holding and operation. Large, easy-view, 4-digit LCD.
  • RUGGED & DEPENDABLE: Tough, smooth exterior disinfects easily with soap or alcohol. Probe covers are not required. Ready to use at the press of a button.
  • IN THE BOX: Pavia Rectal TEMP Veterinary Thermometer, two (2) AAA batteries, Instructions. 90-day warranty.
  • Manufacture: Pavia Sales Group
  • Editor's Impressions Of The Pavia Rectal Temp Veterinary Thermometer
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

Pavia Rectal Temp Veterinary Thermometer Final Thoughts

"It is within."

I bought these for my dwc reservoirs. The units each had a battery in place and situated for immediate use. However, Lucy at Zacro read this review and emailed me. 82 PER THERMOMETER with battery included. My poor fish was in 86 degrees water for a month. Water tested with Autidefy brand for two hours. In the right situation this magnet thermometer is the best available.

Overall Score
5.0


(3 Points)

9. Mini Aquarium LCD Digital Submersible Thermometer Fish Tank Marine Waterproof

MECO Co. First Impressions

"Very accurate."

This little wonder allows me to see at a glance that everything is as it should be. Personally I do not mind the way it looks in my aquarium. You can not swivle the thermometer to face a certain way. I removed the batteries of the units I wasn't using right away. So far, they're all doing their job in my four tanks and I am quite content. For something so cheap, they are working remarkably well. This doesn't bother me as it ws so cheap.

  • Mini Aquarium LCD Digital Submersible Thermometer Fish Tank Marine Waterproof
  • Color: Blue,Weight:36g
  • Wireless with integrated probe, with waterproof casing
  • Read in degree Celcius, LCD display
  • Accurate - Temperature range: 0 - 50℃; Accuracy: 0.1℃.Power Supply:Button Battery
  • Manufacture: MECO Co.,LTD
  • Editor's Impressions Of The MECO Co.
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

MECO Co. Final Thoughts

"So we are ordering more."

I bent it a little bit and when I put it back it was perfectly fine. 82 PER THERMOMETER with battery included. Since adding one of these, it has been much easier to monitor the temp of my tanks. Sure enough the digital thermometer was way off by 6 degrees! It works equally well on all of them. It's kind of difficult to hide and keep out of the way. I have always had trouble reading the color temp.

Overall Score
4.0


(1 Points)

10. Zoo Med Hermit Crab Thermometer and Humidity Gauge, Colors May Vary

User Ratings: 72 4

Zoo Med HC-11 First Impressions

"So far so good."

Excellent working for our bearded dragon tank. 49 thermometer that is 100% accurate. This company is taking the long term view of how to do business right. I used to have a large hang in the side tank that you couldn't miss. Place it on your aquarium and you are good to go. Now I'm getting back in on a much smaller scale with 3 gallon Acrylic Nano tanks. This is my first 5 star review out of many many reviews on Amazon.

  • Zoo Med Hermit Crab Thermometer and Humidity Gauge, Colors May Vary
  • Allows precise monitoring of temperature and humidity
  • Unique velcro backing
  • High level of accuracy
  • Manufacture: Zoo Med Laboratories
  • Item Weight: 0.8 ounces
  • Product Dimensions: 5.2 x 3.2 x 0.6 inches
  • Editor's Impressions Of The Zoo Med HC-11
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

Zoo Med HC-11 Final Thoughts

"Very accurate."

The suction works for a month at a time- in pool and hot tub circulation. Checked with temp gun and the terrarium was on target at 88. I have to admit I had two reasons for buying six. So, in those cases, I find it easier to simply replace it. I have mine on my 60 gallon cube marine tank. The extra batteries where very much appreciated and came in handy. Put them all in the same tank and they read very close to each other.

Overall Score
4.5


(368 Points)

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