Editor's Choice - Our Favorite Ade Advanced Optics Aquarium Thermometers

1. Ade Advanced Optics Dual Scale 1.0 to 1.070 S.G. Salinity Refractometer for Aquarium & Seawater

User Ratings: 75 5

Ade Advanced Optics SSA0010 First Impressions

"I like these."

The suction works for a month at a time- in pool and hot tub circulation. You can glue, tape or simply cover the cords in the tank to keep them discreet. I used these on a number of my aquariums that have discus fish in them. The units each had a battery in place and situated for immediate use. I have kept aquariums for about 45 years. I use a small flashlight if I don't want to brighten the area. The non-working ones still provide 2 batteries each AND.

  • Ade Advanced Optics Dual Scale 1.0 to 1.070 S.G. Salinity Refractometer for Aquarium & Seawater
  • One scale checks the NaCl levels with the range of 0-100 ppt (with 1 ppt scale divisions) and the other scale gauges Specific Gravity with a range of 1.000 to 1.070(+/-0.001 accuracy)
  • Features ATC (Automatic Temperature Compensation) for accurate readings.
  • Sturdy design, compact in size and light in weight, convenient to keep up and carry around.
  • It is suitable for a marine saltwater tank.
  • This Refractometer is backed by a 2 Year - No Hassle - Free Replacement Guarantee.
  • Manufacture: Ade Advanced Optics
  • Product Dimensions: 2 x 2 x 7 inches; 6.4 Ounces
  • Editor's Impressions Of The Ade Advanced Optics SSA0010
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

Ade Advanced Optics SSA0010 Final Thoughts

"Works perfect."

My 50+ eyes cannot read a regular tank thermometer without squinting. Since it is a mercury thermometer, it is very accurate. I ordered this guy and it was 6 degrees hotter than the digital! 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. For the price I'll probably end up putting these in all of my aquariums. I tested this in a cup crammed full of ice and some water.

Overall Score
4.5


(854 Points)

2. Pet Thermometer, Professiona Pets Electronic Thermometer Dog Digital Thermometer Veterinary Supplies...

User Ratings: 47 22

TiTaKa 99BL49EA45Z10615TA First Impressions

"1 degree of each other."

I have always had trouble reading the color temp. Have checked them against the glass thermometers and the accuracy is right on. You can not swivle the thermometer to face a certain way. It is about 6 inches in length and roughly an inch wide. And I just really started to doubt it. I read some of the 1 star reviews and most of them are not about the product. I ordered this guy and it was 6 degrees hotter than the digital!

  • Pet Thermometer, Professiona Pets Electronic Thermometer Dog Digital Thermometer Veterinary Supplies for Pet Dogs Animals
  • Soft probe: waterproof non-toxic rubber probe, soft, soft to the touch, comfortable, safe, and will not harm the rectum of the animal.
  • Plastic material: ABS material, waterproof and environmental protection, mercury-free, safer.
  • Easy to view: LED display beeps, making the readings clearer and more accurate.
  • Simple operation: Built-in clamps make temperature measurement more convenient. You can start measurement with one click.
  • Portable design: small size, light weight, easy to carry around without taking up space.
  • Item Weight: 0.529 ounces
  • Product Dimensions: 5.71 x 0.79 x 0.47 inches
  • Editor's Impressions Of The TiTaKa 99BL49EA45Z10615TA
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

TiTaKa 99BL49EA45Z10615TA Final Thoughts

"89 plus free shipping."

I tested this in a cup crammed full of ice and some water. I ordered this guy and it was 6 degrees hotter than the digital! I find that the temps are accurate, and this product gives added peace of mind. The plastic from the suction cup quickly turned from a clear to a milky white. We are using them to measure various temperatures inside and outside of a motorhome. I recommend gluing the suction cups in place where needed for long-term installation. All are pretty accurate within one degree as claimed.

Overall Score
3.6


(18 Points)

3. uxcell Aquarium Fishbowl Dual Scale Thermometer Sticker Strip 2 in 1

User Ratings: 22 22

uxcell US-SA-AJD-33116 First Impressions

"Easy to setup in tank."

So this is the extreme end of the high temperature range. It works equally well on all of them. The suction will never be the same. So far, they're all doing their job in my four tanks and I am quite content. Only thing I don't love is how long the cord is. He acted aggressively towards it and so I ultimate ended up removing it due to that. I was using one of those ubiquitous cheap digital thermometers on Amazon.

  • uxcell Aquarium Fishbowl Dual Scale Thermometer Sticker Strip 2 in 1
  • Product Name : Aquarium Thermometer Sticker;Color : Black, White
  • Material : Plastic
  • Size : Rectangle: 13 x 1.9cm/ 5.1" x 0.75"(L*W)Round: 5cm/2"(Diamater)
  • Weight : 3g
  • Package Contents : 2 × Aquarium Thermometer Sticker
  • Manufacture: uxcell
  • Editor's Impressions Of The uxcell US-SA-AJD-33116
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

uxcell US-SA-AJD-33116 Final Thoughts

"Close enough I reckon!"

89 I could buy Six Thermometers with Six included batteries. One extra battery came with each unit. I needed a solution that was not breakable and these do the trick! Checked with temp gun and the terrarium was on target at 88. I have always had trouble reading the color temp. I tested this in a cup crammed full of ice and some water. Then she followed up again on that, asking if they had arrived and were okay.

Overall Score
3.6


(3 Points)

4. SunGrow Digital pH and TDS Meter Set, Accurate Readings, Easy to Read LCD Screen, Monitor Aquarium, ...

User Ratings: 57 6

SunGrow First Impressions

"Great product!"

This thermometer is spot on accurate. 50 thermometers, reads much easier and no suction cup residue, also looks better. I just wrote it off as a minor loss. Checked with temp gun and the terrarium was on target at 88. I bent it a little bit and when I put it back it was perfectly fine. I think the people who said the suction cup broke. Set all six probes up in a terrarium with a constant temp of 88.

  • SunGrow Digital pH and TDS Meter Set, Accurate Readings, Easy to Read LCD Screen, Monitor Aquarium, Fruit, Tap Water, Pool Water, 4 LR44 Batteries Included
  • ✔ TWO-IN-ONE SOLUTION --- This Ph and TDS combo meter by SunGrow will give you the best of both worlds in one device. This SunGrow pack includes electrodes and components needed to test both the pH and TDS of any water solution. It’s easy to use and less equipment to deal with than two separate devices.
  • ✔ ENERGY-SAVING, LIGHTWEIGHT AND PORTABLE DEVICES--- This PH and TDS meter has a handheld pen-type design that weighs barely 1.7 oz making it lightweight and portable. It comes with a handy case that you can easily slip into a backpack or work bag if you need to bring it with you. The meter shuts off automatically after 10-minutes of non-use to conserve batteries. (BATTERIES INCLUDED)
  • ✔ CALIBRATION SCREWDRIVER INCLUDED --- These meters have been factory-calibrated and are designed to stay consistent. However, if you need to recalibrate your meter from time to time or you want to calibrate for different applications, you can use the screwdriver calibration tool included for continued accurate readings of your water. The TDS meter is most accurate when calibrated as close as possible to the sample to be tested.
  • ✔ HIGHLY ACCURATE READINGS --- This pH and TDS professional level water test meter precisely measures and monitors the levels in your aquarium or other liquid solutions. The SunGrow pH and TDS meter will give you extremely accurate readings of the ph levels and Total Dissolved Solid within ± 2% range.
  • ✔ MULTI-USE MEASURING TOOL--- This little tool is a valuable instrument for keeping a tab on various bodies of water. You can use it to make sure the level in your freshwater or saltwater aquarium is optimal for your fish, test water in a laboratory or for the hydroponically grown vegetables. You can also test the swimming pool, tap water, and spa water.
  • Manufacture: Luffy Pets Collection
  • Editor's Impressions Of The SunGrow
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

SunGrow Final Thoughts

"Easy to setup in tank."

When I set up my newest tank I will be getting another one of these. My 50+ eyes cannot read a regular tank thermometer without squinting. Love it, it's easy to read and keeps an accurate temp. I used to have a large hang in the side tank that you couldn't miss. It will make you wonder why nobody thought of it before. Bought the two pack of thermometers. Place it on your aquarium and you are good to go.

Overall Score
4.2


(44 Points)

5. Lomodo 16 Pack Floating Thermometer Aquarium Glass Temperature Gauge with Suction Cup for Fish Tank ...

User Ratings: 42 15

Lomodo First Impressions

"Works well!"

All were Close enough for a fish tank and other uses. I used these on a number of my aquariums that have discus fish in them. I don't think i'll ever be able to trust a digital thermometer again. SIX Digital Thermometers with SIX batteries INCLUDED working so well. I tested this in a cup crammed full of ice and some water. The display can be set to Fahrenheit or Celsius. I am extremely pleased with this product.

  • Lomodo 16 Pack Floating Thermometer Aquarium Glass Temperature Gauge with Suction Cup for Fish Tank (0-40℃/40-100℉)
  • You will get large quantities of 16 pack floating thermometer, enough for several aquariums
  • Made of clear glass tube and PVC suction cup, good quality and durable, packaged in blister, providing from breaking during transportation
  • Red indicator line let you read the temperature quickly and easily, temperature ranges from 0-40℃/40-100℉
  • Come with suction cup, which can suck the aquariums wall tightly
  • Widely application: you can put it in your pool, pond, fish tank, aquariums, etc
  • Manufacture: Lomodo
  • Product Dimensions: 6.3 x 2.56 x 1.02 inches; 10.62 Ounces
  • Editor's Impressions Of The Lomodo
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

Lomodo Final Thoughts

"So far loving it."

Personally I do not mind the way it looks in my aquarium. Simple fix, you adjust the thermometer within the suction cup and VIOLA! 89 I could buy Six Thermometers with Six included batteries. Personally I do not mind the way it looks in my aquarium. The plastic from the suction cup quickly turned from a clear to a milky white. So far, they're all doing their job in my four tanks and I am quite content. You can use the thermometer with or without the plastic suction cup.

Overall Score
3.6


(3 Points)

6. Inkbird C929A Wi-Fi Aquarium Temperature Controller with 1200W Dual Probe Thermometer for Fish Tank,...

User Ratings: 67 9

Inkbird First Impressions

"Love it for my turtles."

So, in those cases, I find it easier to simply replace it. They are within a degree or two of other thermometers I've checked to compare them. Since adding one of these, it has been much easier to monitor the temp of my tanks. Very impressed, I have now had them in used for a month so far. I have this thermometer on all my tanks. I had my heater set at 73-degrees and the thermometers showed 74. The suction will never be the same.

  • Inkbird C929A Wi-Fi Aquarium Temperature Controller with 1200W Dual Probe Thermometer for Fish Tank, Water Terrarium
  • [Plug and Play] The 1200w high-power aquarium temperature controller is compatible with most kinds of heaters, you don’t need to assemble the product yourself, just plug and play.
  • [Two Probes] Your fish might be in danger as it is hard to know the probe is broken immediately if the temperature controller has only 1 probe. The dual probe aquarium temperature controller will alarm if the temperature difference between 2 probes is bigger than 3℃/5℉, and the app will push a notification at the same time.
  • [Dual Protection:]The aquarium temperature controller is equipped with 2 relays to ensure that the power can be turned off under any circumstances, this will protect your fish from being hurt by overheated water.
  • [APP Notification] Pair the aquarium temperature controller with your phone via 2.4GHz Wi-Fi, the device will alarm if there are exceptions. And all exceptions will be updated to the APP, the app will push notifications to remind you.
  • [Continuous Heating Alarm]The heating time can be set according to your needs from 1 hour to 72 hours, the controller will alarm if water can not be heated to the setting temperature within the specified time. The temperature setting range is 20.0℃~35.0℃/68.0℉~95.0℉ and the detectable temperature range is -40℃~100℃/-40℉~212℉.
  • Plug-n-Play, easy to use
  • Dual relay controlling, one for control output, another for abnormal protection
  • Support Celsius and Fahrenheit reading
  • Manufacture: Inkbird
  • Editor's Impressions Of The Inkbird
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

Inkbird Final Thoughts

"Overall a great buy."

It started working as soon as I put it in and has been working ever since. When and if we run out of this batch, I'll instantly order another batch. One extra battery came with each unit. 6 in a pack, extra batteries, easy set up, great price. And is easily hidden behind a plant. I've checked it against two other thermometers that are accurate. And for the price you cant beat it.

Overall Score
4.3


(33 Points)

7. 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)

8. COOSO Thermometer, 50/110°C Digital LCD Thermometer for Aquarium Freezer Frozen Refrigerator Fridge...

User Ratings: 37

COOSO thermometer First Impressions

"It works great."

Good cheap accurate aquarium thermometer. Put them all in the same tank and they read very close to each other. Still a recommendation for me due to price and accuracy. Very accurate, have checked it with other thermometers as well. It's kind of difficult to hide and keep out of the way. The non-working ones still provide 2 batteries each AND. And I just really started to doubt it.

  • COOSO Thermometer, 50/110°C Digital LCD Thermometer for Aquarium Freezer Frozen Refrigerator Fridge Freezer
  • Cable Length:3.28foot/1meters,Ideal for use in refrigerators,chillers and deep freezes the thermometer has a range of (-122°F-158°F)-50°C to + 70°C,Free switch between Celsius and Fahrenheit
  • Power:1.5v LR44 button cell batteries ( included )
  • Professional Digital Thermometer for Hydroponics & Aquaculture, Amphibian & Reptile Terrariums, Freshwater Tropical Fish & Saltwater Fish Aquariums
  • Real-time monitoring of the temperature of the water, Ideal for aquariums & reptile habitats
  • Do not submerge the LCD display unit under water
  • Manufacture: GUSHU LTD.
  • Product Dimensions: 2.3 x 1.5 x 0.6 inches; 0.63 Ounces
  • Editor's Impressions Of The COOSO thermometer
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

COOSO thermometer Final Thoughts

"Perhaps it's my fault."

Still a recommendation for me due to price and accuracy. I have bought many many temperature gauges for my various fish tanks over the years. It is large enough to see without being obtrusive. One of my aquariums is glass, and the other two are plastic. I needed a solution that was not breakable and these do the trick! I have to admit I had two reasons for buying six. Who knows, whatever it was, it was revolting!

Overall Score
4.4


(2 Points)

9. Water & Wood New Aquarium Fish Tank Water Submersible Suction Glass Thermometer Weatherglass

User Ratings: 29 28

Waterwood First Impressions

"So far loving it."

He acted aggressively towards it and so I ultimate ended up removing it due to that. All are pretty accurate within one degree as claimed. Just BE CAREFUL WHEN ADJUSTING, IT IS GLASS AND WILL BREAK. So versatile, I can read the temperatures literally anywhere. One of my aquariums is glass, and the other two are plastic. Ambient room temperature measures 72. These things are useful for a lot besides pet husbandry, too.

  • Water & Wood New Aquarium Fish Tank Water Submersible Suction Glass Thermometer Weatherglass
  • New Aquarium Fish Tank Water Submersible Suction Glass Thermometer Weatherglass
  • New item with high quality
  • Manufacture: Water & Wood
  • Editor's Impressions Of The Waterwood
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

Waterwood Final Thoughts

"Not just for aquariums!"

I can't say which is the most accurate and don't really care. These things are useful for a lot besides pet husbandry, too. Only thing I don't love is how long the cord is. I recommend gluing the suction cups in place where needed for long-term installation. I did have a problem with one in my first pack of 6. It is my opinion that everyone should have these that are in the Aquarium Hobby. Since adding one of these, it has been much easier to monitor the temp of my tanks.

Overall Score
3.1


(5 Points)

10. uxcell Temperature Gauge Aquarium Thermometer with Probe for Refrigerator 2pcs

uxcell First Impressions

"Not just for aquariums!"

For the price I'll probably end up putting these in all of my aquariums. He was moving slow in the winter and we realized he needed a heater! You can not swivle the thermometer to face a certain way. Instead she sent a new package of two, both of which work. I have it in both my aquariums now. So far, they're all doing their job in my four tanks and I am quite content. I used these to raise chicks, and in my parrot cages.

  • uxcell Temperature Gauge Aquarium Thermometer with Probe for Refrigerator 2pcs
  • Temperature range: -50°C ~ +85°C (-58°F ~ +185°F)
  • Designed to 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: A19010400ux0397
  • Item Weight: 2.89 ounces
  • Size: 2 Piece
  • Power Source: Battery Powered
  • Batteries Required?: No
  • Editor's Impressions Of The uxcell
  • Thermometer Accuracy
  • Quality
  • Value For Money
  • Affordability

uxcell Final Thoughts

"89 plus free shipping."

These things are useful for a lot besides pet husbandry, too. I removed the batteries of the units I wasn't using right away. He was moving slow in the winter and we realized he needed a heater! Now that the chickens are grown, I have one out in the coop as well. So far, they're all doing their job in my four tanks and I am quite content. A battery can last you up to six months, I'd say, but expect more like three. So the extra units will always come in handy.

Overall Score
3.6


(2 Points)

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