AQUANEAT Aquarium Thermometer, Fish Tank Thermometer, Digital Temperature Test, with Large LCD Display (1 Pack)
Condition: New
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Availability:
In Stock.
Arrives
Saturday, Jan 10
Size: 1 Pack
Features
- Wide application: Ideal for use in water or high moisture environment like aquarium terrarium, or vivarium; suitable for different water types such as fresh water, tap water, salty water, marine water and etc.
- Easy to read: Comes with a large LCD display that is easy to read clearly. Thermometer size: 2.3" (L) x 1.5" (W)
- Easy to setup: Submerge probe with suction cup can easily be set in water (Submerge probe only, do not submerge thermometer in water) ; Press ''PWR'' for 3 seconds to power off
- Free Battery: 1 PC LR44 button cell battery for each thermometer.
- Wide temperature range: Measure -58F to +158F (-50C to +70C) with accuracy +/- 1C
Brand: AQUANEAT
Special Feature: High Accuracy
Age Range (Description): Adult
Included Components: No
Outer Material: Plastic
Display Type: Digital
Unit Count: 1.0 Count
Power Source: Battery Powered
Model Name: A045
Number of Batteries: 1 LR44 batteries required.
Is Discontinued By Manufacturer : No
Package Dimensions : 2.95 x 2.95 x 0.67 inches; 1.13 ounces
Item model number : DT-A045^
Batteries : 1 LR44 batteries required.
Date First Available : December 9, 2016
Manufacturer : AQUANEAT
Best Sellers Rank: #6,096 in Pet Supplies (See Top 100 in Pet Supplies) #3 in Aquarium Thermometers
#3 in Aquarium Thermometers:
Customer Reviews: 4.2 4.2 out of 5 stars 6,740 ratings
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Saturday, Jan 10
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Size: 1 Pack
I use this for my newly hatched tortoises in a nursery and I use one as a backup in the incubator with my Redfoot eggs as a backup to check temps. I have had no issues with these. I have a thermometer inside each of these that reads temps/humidity and I check temps etc. on the outside against what the ones read on the inside (also against what the incubator is set at). I find that these little aquarium thermometers are pretty accurate, durable, easily read, and last a long time before a battery needs to be changed. I have easily found the batteries at Dollar Tree also. I would definitely buy these again.
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Reviewed in the United States on November 11, 2025 by Aiden (Shelley Stearns)
Size: 6 Packs
The six pack is incredibly cheap. Comparisons to other less-fragile designs are unhelpful because the cost will always be much higher than this very common design. This specific design is sold under many different names/brands, but clearly, it is the same product (if not from the same production site, it is at least identical tooling/materials/process). ALL brands of this design have a set of known design flaws. The juncture of the cord entry to the case is susceptible to disruption; the tension of the battery spring/contact is subject to fatigue; and the force required to remove/replace the battery compartment cover contributes to a shorter life of the instrument, which may, or may not, be related to the aforementioned battery contact. All of these details indicate that the set of best practices is to install the unit with care for these design limitations: avoid de/reinstallation cycles; avoid removal of the battery cover; avoid variable tension to the wire at the junction to the case; install the control box at an angle conducive to ease-of-viewing (so that there is no need to manipulate the control box to see the readout. All of this contributes to approximating a single installation event with no further touching, tilting, pulling, or pushing. [Consider my description as an unreasonable goal, but I hope that my description will at least set an expectation the product's durability is inversely proportional to the user's divergence from the goal.] Most of the criticisms of this product are based on inappropriate expectations for its design, including the unfounded assumption that its design should allow for relocation and transfer to a series of installations over time. My solution to that problem is to use a different, more robust (and more expensive) instument. Nothing about the product’s marketing suggests that it should be anything but a single, permanent installation. That said, I have successfully dis-integrated and re-integrated these from time to time, with success, but ALSO with care and forethought regarding the fragile points of its design. Reports persist that certain brands of this singular design are better performers than other brands, and it is clear that these reports are speculative and that the reliability factor between brands is within the bounds of the statistical likelihood of failure across ALL brands. I have used approximately 75 of these units over a period of 5 years, of 5 different brands, and my experience is unexceptionally consistent: some units fail more quickly than others, irrespective of brand/source; the risk of failure correlates with the number of times the product is moved or its placement reconfigured. The risk of failure caused by removal of the battery cover is substantially higher than other sorts of manipulation (for example, dropping the box, or tension on the cord). The reason for this is that the removal and replacement of the cover, while a simple task, requires substantial pressure on other parts of the box to provide the leverage for the maneuver, and these random, repeated squeezes of the outer case seem to be associated with deterioration of performance (such a the display). The suction cup threaded to the wire is most likely present to achieve a specific task: to maintain appropriate constant tension (or lack thereof) to the cord with respect to the junction at the case. Whether applied tension is the designer's intended method of installation is not certain. However, use of the suction cup to preserve a steady-state of the cord tension seems to be a successful aspect of installation. The junction of the cord to the probe-head seems uniformly robust and has never been a point of failure in my experience. The fact that the unit comes with an extra battery should not be construed as evidence that the unit is designed to last longer than the life of the first battery. Rather, I consider the extra battery as a bonus in that I hold these in reserve for other applications (it is a commonly used size/voltage in small electronics)…the retail price of the extra batteries alone exceeds the actual cost of this 6 pack of units.
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Reviewed in the United States on August 22, 2022 by MLGdwn
Size: 6 Packs
At first, I thought these were off because they were saying my water was at around 80F, and to me that water was kinda cooler. So it makes me wonder how hot our showers are we take.
Reviewed in the United States on November 11, 2025 by Purchaser
Size: 1 Pack
Does great I have this in the corner of my tank and check it throughout the day and it’s pretty accurate I have a room thermometer that I have sitting in the same area and the tank thermometer and room temperature are always no more than 2° off which is normal It’s nice and small so it isn’t a complete eye sore and the suction has held up for 2 weeks now so I’d say it’s pretty good lol
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Reviewed in the United States on October 18, 2025 by Diamond Johnson
Size: 1 Pack
This little thermometer works great. It’s very accurate and easy to read.
Reviewed in the United States on November 13, 2025 by Terri
Size: 3 Packs
First, not as described the batteries are shown new but mine were preinstalled and 2 of the three show low life left in them. Second, not accurate or stable. Why would anyone buy a measuring device that was not accurate? So wasted $10 on the three pack. I am considering changing the batteries just to see if they will work then but probably I am just throwing good money after bad.
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Reviewed in the United States on November 19, 2025 by Andrew S.
Size: 3 Packs
Very easy to use. Accurate. I have two in my aquarium one on each end and they both read exactly the same to the digit . Very accurate nd precise .
Reviewed in the United States on October 21, 2025 by Amy C.
Size: 1 Pack
I guess for the price its ok. I googled how to check it's accuracy and in an ice water bath it should read 32° but mine read 33.4°. So a little more than the +/- of 1° it says in it's description. But now I know it reads 1.4 higher and can adjust to get the correct temp.
Reviewed in the United States on April 28, 2025 by K8smomma