VIVOSUN 4-Pack LCD Digital Aquarium Thermometer Fish Tank Water Terrarium Temperature with Suction Cup for Turtle
$15.99
Price: $15.99
(as of Aug 14, 2025 11:47:13 UTC – Details)
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At Vivosun, our mission is to empower every grower to cultivate what they’re passionate about. We’re dedicated to advancing hydroponic technology that nurtures growth, fuels enthusiasm, and supports the diverse community of cultivators in their pursuit of what they love – growing green!
Aquarium Pumps
Vivosun’s aquarium pumps help you discover a vibrant and pristine water environment.
For A Clean & Lively Aquarium
Build Your Water Gardens
Create A Thriving Garden
Innovative Indoor Growing
What problem are we solving?
Indoor gardening can be complex. We simplify it by integrating technology that optimizes light, airflow, and environmental control. Our smart systems make gardening easier, helping both beginners and experts achieve thriving plants effortlessly.
What makes our products unique?
Vivosun combines innovation, quality, and sustainability. Our smart products—such as Vgrow, AeroLight, AeroZesh, and GrowHub—streamline gardening with automated controls and energy-efficient features, ensuring better growth outcomes while reducing environmental impact.
Product Dimensions : 0.01 x 0.01 x 0.01 inches; 6.7 ounces
Item model number : 330120x4J
Date First Available : June 20, 2019
Manufacturer : VIVOSUN
ASIN : B07TBDJV31
Best Sellers Rank: #21,649 in Pet Supplies (See Top 100 in Pet Supplies) #18 in Aquarium Thermometers
Customer Reviews: 4.3 4.3 out of 5 stars 5,745 ratings var dpAcrHasRegisteredArcLinkClickAction; P.when(‘A’, ‘ready’).execute(function(A) { if (dpAcrHasRegisteredArcLinkClickAction !== true) { dpAcrHasRegisteredArcLinkClickAction = true; A.declarative( ‘acrLink-click-metrics’, ‘click’, { “allowLinkDefault”: true }, function (event) { if (window.ue) { ue.count(“acrLinkClickCount”, (ue.count(“acrLinkClickCount”) || 0) + 1); } } ); } }); P.when(‘A’, ‘cf’).execute(function(A) { A.declarative(‘acrStarsLink-click-metrics’, ‘click’, { “allowLinkDefault” : true }, function(event){ if(window.ue) { ue.count(“acrStarsLinkWithPopoverClickCount”, (ue.count(“acrStarsLinkWithPopoverClickCount”) || 0) + 1); } }); });
High Accuracy: Temperature Range: -50℃ to +70℃ (-58 °F to +158 °F); This aquarium thermometer is accurate to +/- 1℃, no matter whether the probe is placed in any corner of this fish tank, an accurate temperature will be displayed
LCD Display: Comes with a large LCD display that is easy to read clearly and accurately
Adjustable Unit Temperature: Easy to adjust the temp between Fahrenheit and Celsius displays; Long-press the power button to adjust the unit display
Two Suction Cups: Equipped with two suction cups, one for attaching the cable to the side of the tank and another for attaching the thermometer
Super Long Cable: The cable length connected to the probe is 78.74 inch (2 m) superior to 23.62 inch (60 cm) standard cable length; Allows accurate temperature measurements in even the largest fish tanks
Customers say
Customers find the thermometer easy to use and read, with good value for money and positive feedback for its water resistance, particularly for fish tanks. The accuracy and functionality receive mixed reviews – while some find it accurate and working well, others report temperature readings being off by 1-2 degrees and the unit failing after a couple of weeks. The suction cup quality is problematic, with customers noting it doesn’t stick well, and the cord length receives mixed reactions.
13 reviews for VIVOSUN 4-Pack LCD Digital Aquarium Thermometer Fish Tank Water Terrarium Temperature with Suction Cup for Turtle
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Amanda –
Love it fast reading
Accurate and easy to readThis thermometer is simple but works perfectly. The display is clear, the suction cup sticks well, and the temperature readings have been spot on. Great value for a basic setup
Daniel –
Great for the price
The accuracy is of by two degrees but that’s not a problem for me. I measured the water with a different thermometer at 89 degrees and the 2 I put in my aquarium were reading 87.2 degrees. The suction is decent to hold up the thermometers in a fish tank but they aren’t strong enough to withstand a small tug from my eed eared sliders.My turtle pulled one of them into the water and I didn’t realize until late in the evening. But I retrieved it, took out the battery and let it dry out for a day. I put a new battery in and it was still working and giving the same accuracy as the other thermometer as if nothing had happened. Overall I’m satisfied with their functionality.
Alan Kidd –
Side by side at room temperature have up to 8 degree discrepancy
I’ve bought these 5 times because of the price. Plus, there are so many sellers of similar products, with similar ratings, so it’s hard to know who really has the best product. So I just deal with it as below. Overall, I am currently using many of these in my aquarium room with 19 tanks.Laying these out at room temperature, majority of them had the same temp. One was +5 degrees and one was -3 degrees, with others ranging in between, as compared to the majority at 70 degrees. Not sure if there is a way to recalibrate. So I use a fluorescent marker and put the temp adjustment on that thermometer.Majority of the suction cups don’t stay stuck to either the inside or outside of the aquarium glass. On the outside, I’ve used just a dab of silicone to hold in place. For the inside, I’m not as worried about it sticking, as long as it’s in the water close to flow and not close to the heaters. I don’t use silicone on the inside because I want to be able to clean the glass quickly and easily.As for being able to read, as long as I’m looking directly from the front at them and the room is well lit, they are easy to read. But if I’m at an angle or I don’t have the room light on (just the aquarium lights) then no quite so easy. I like that I can toggle between degrees F and C if I want to, not that I need to very often. More out of curiosity when I first got them.I’ve had to replace the batteries in a few of these right after I got them. But other than that, I really like using these and having them for my aquarium room.
S. MARKS –
Within 0.1 Degrees accurate.. Perfect back-up battery thermometer.
I bought these as a backup to my plug in Digital Heater and Digital Thermometer. It’s within 0.1 degrees across the board (all 3 thermometers). I’m extremely satisfied. These look like many on Amazon (I’ve tried others that look the same-bad) but the work. For any aquarium I’d recommend these. It’s peace of mind with a battery backup that’s accurate. Cheap and good? It’s possible.. Here’s the example.
Amy K –
This is not a great thermometer
This is not something I will buy again. I thought it was a battery and bought new ones and still won’t work. It’s junk.
Greg Singleton –
It Fails after a few months
Worked for few months but the temp reading is completely wrong now. I tried new battery but that didn’t fix it.
TC –
OKAY but suction cups fail! Pretty quickly!!!!
Initially worked well until the suction cups started failing. Useless after thatâ¦â¦I used this product in a saltwater aquarium so this may have affected its durability.
Brandon Wood –
Works Well
Affordable and works well.
Jennifer –
Das ist der gröÃte Schwachsinn den ich nach langer Zeit gekauft habe.Ich habe alle drei Thermometer in ein und den selben Becken drinne und ungelogen jedes einzelne zeigt ne andere Temperatur an! Was ist das für ein Mist!Zu Beginn dachte ich noch meine Heitzung wäre kaputt, weil mir das erste Thermometer aufeinmal 28 grad anzeigte, also habe ich zur Sicherheit ein anderes Thermometer mit rein gehangen und siehe da die Heizung ist komplett in Ordnung.Ich Rate ausdrücklich vom Kauf ab!Habe jetzt einfach mal zum testen alle drei Thermometer rein getan um zu gucken ob vll eins kaputt ist …. naja sie zeigen 22, 24 und das letzte mittlerweile 28.4 Grad an ?!
Andy Dee –
Had it for a few months. Easy to use and pretty accurate. I recommend.
Dominic G. Toa –
It’s waterproof and digital but not very accurate. I use it for my cold plunge and measured the water with a cooking thermometer and it’s easily 1 degree off. Might not be a concern for general use but in an aquarium where water temp is important, be advised
Robbie Keene –
These work great. The suction cups they came with didn’t work at all but I bought some velcro circles from the dollar store and problem solved.,
Pete –
Four thermometers. Four vastly different readings. I used water at 65 degrees F. I used an exceptionally accurate thermocouple to measure the water temp. The four thermometers measured, 59.2, 60.0, 61.4, and 62.1. Completely useless for my application. They are a sub-standard chinese product with Vivosun branding printed on them. This design is widely available from many different merchants – each with their own branding. They are renowned for being inaccurate. I should have researched them more carefully. Despite some positive reviews, you should save your money. Avoid them.