AQUANEAT Aquarium Thermometer, Fish Tank Thermometer, Digital Temperature Test, with Large LCD Display (1 Pack)

This works great in reading my 65 gallon tank's temp. Display is great!

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.

Honestly, I really love this thermometer because the price is extremely cheap but it competes very well with more expensive aquarium thermometers. When I was looking for one for my fish tank, I wanted something simple, clean-looking, and easy to place on the glass, and this one met all my expectations. Installation is very easy, and I really like that it has two ways to measure temperature and switching between them is simple. The design is minimal but effective, and it does exactly what it’s supposed to do. For the price, I honestly don’t think you can go wrong. I highly recommend it because it’s one of those purchases you won’t regret.

No, I was gonna use this to make sure that I can have a good temperature and make sure I’m not killing my fish. Let’s just say this is not the best accurate temperature probe you could use you’ll end up just getting a infrared temperature probe for more money and get accuracy than this one right here I would say other brands is kind of better than this brand for temperature probes and stuff. The accuracy isn’t really that accurate. I mean you’re like my tank is pitch code and it gives me the reading of 81° and it’s not even 81° degrees in my tank mind you definitely not the best accuracy readability is not really the best either you can’t even see it in the dark either when you’re trying to check buttons, there’s no restart button if you get inaccurate and it doesn’t you can’t just press like restart temperature monitoring again like not really the best especially for trying to track another thing. Is that this temperature probe it doesn’t really give the accurate eating either so I mean bye and see how you like it but for me this product is not the best.

I purchased the AQUANEAT Digital Aquarium Thermometer on December 11, 2021, and it's served me well for over three years! I primarily used it in my bearded dragon's 20 and 40-gallon tanks to accurately monitor the temperature of his basking hammock. It consistently provided reliable readings, which was crucial for ensuring my reptile's health. The unit came with two batteries, and I was impressed by their longevity. Both batteries lasted until February 27, 2025, when the thermometer finally stopped working. That's a solid lifespan for a budget-friendly device! The large LCD display is clear and easy to read, making quick temperature checks a breeze. It did its job perfectly. The only minor downside is that the suction cup was essentially useless and wouldn't adhere to the glass. However, considering the excellent performance and incredibly affordable price, I can easily overlook this. I simply placed the unit where it was easily visible. Overall, I'm very satisfied with the AQUANEAT thermometer. It's a great product at a great price, and it served its purpose admirably for a long time. I would definitely recommend it to anyone needing a reliable and inexpensive temperature monitor for their aquarium or reptile tank.

They worked when I first put them in the 3 different tanks. 3 days later all 3 are stuck at 81.5 and no matter what, they dont move from that anymore. I've tried turning it off, I've tried taking the battery out. I put it in ice water. They don't move from 81.5 F. I do not recommend.

Worked perfectly to monitor the temperature of the water inside my Donjoy iceman icing unit used for after surgery. I know it’s not the intended use but offering this as a suggestion for others with this need. The cord is thin and feeds into the water and the lid still closes just fine.