Mini Submersible Aquarium Heater, 25/50/100/150/200/300 Watts Adjustable Fish Tank Heater, Built-in Thermometer, External Temperature Controller, Smart Memory (10 Watts(USB))
$9.99
Price: $9.99
(as of Oct 07, 2025 06:36:55 UTC – Details)
Product description
Ultra-compact size, Easy to install, Easy to hide, Used for fish tank below 1 gallon
Parameter:
Power: 10 WattsFish tank volume: below 1 gallonInput: 5V DCTemperature range: 64~93 ℉Temperature accuracy: 1 ℉Power cord length: 4.3 feets
Packaging:
1 x Heater with External Controller, 1 x Suction Cup, 1 x User Manual
Safety. 5V usb powered, prevent electric shock
Adapter is not includedAdapter requirement: 5V, above 2A, above 10WIf the adapter doesn’t have enough power, the controller will starts up repeatedly and the numbers in controller will be flashed.It is the best choice if you have children in your home.
Overheating protection to prevent cooking fish
Overheating protection. Built-in temperature sensor. The heater will stop heating automatically if the water temperature exceeds 95℉. Display ‘H1’. The heater will re-work when the temperature below 93℉color indicator, 3 Error codes.
RED: Heating / GREEN: No heating / YELLOW: Fault.E1: Out of water / H1: Overheating / H2: Dry running.
Switch temperature unit between C and F
Power off the heaterPress and hold ‘SET’ button, power on the heater, and then release the button, the temperature unit will be changed between C and F.
External temperature controller
Easy to set the temperatureEasy to adjust the temperatureEasy to read the temperatureNo need extra thermometerPlease note that it is not waterproof
Memory the temperature setting
The temperature setting will be stored automatically.If the power is turned off and then restored, the heater will automatically load the last temperature setting.The intelligent memory function will protect your fish under any circumstances.
CAUTIONS:
The device must be used under rated voltage 5V.When there is moss or other dirty on the heater surface and the LED screen, it needs to be cleaned up with soft brush in time.Disconnect power socket and wait for 15 minutes before changing water or remove heater.Place the heater in the way of water flow and don’t bury it.If the numbers in the controller are flashing, please replace a high-power adapter to ensure that the current is above 2A and the power is above 10W
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Customer Reviews
4.2 out of 5 stars 377
4.2 out of 5 stars 377
4.2 out of 5 stars 377
4.2 out of 5 stars 377
4.2 out of 5 stars 377
Price
$17.99$17.99 $18.99$18.99 $19.99$19.99 $24.99$24.99 $24.99$24.99
Voltage
120V 120V 120V 120V 120V
Tank volume
3-5 gallon 5-10 gallon 10-20 gallon 20-40 gallon 40-60 gallon
External temperature controller
✓
✓
✓
✓
✓
Is Discontinued By Manufacturer : No
Product Dimensions : 2.17 x 0.79 x 0.79 inches; 4.66 ounces
Item model number : AU-001
Date First Available : August 10, 2022
Manufacturer : auomii
ASIN : B0B96GPB1M
Best Sellers Rank: #31,762 in Pet Supplies (See Top 100 in Pet Supplies) #69 in Aquarium Heaters
Customer Reviews: 4.2 4.2 out of 5 stars 377 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); } }); });
Automatic Constant Temperature: aquarium heater is specially designed for mini fish tank for gallon, the heating will be automatically stopped when the set temperature is reached
External Temperature Controller: Set the temperature via an external controller instead of submerging the hands in water and turning the dial
Easy to Install: Thanks to the ultra-compact heater with powerful suction cup, it can be easily installed anywhere in the tank
Easy to Read: The water temperature will be displayed on the external controller in real time, no need another aquarium thermometer
Overheating Protection: Prevent cooking fish as overheating protection, stop heating automatically when overheating or lack of water
Customers say
Customers find the aquarium heater works well, particularly for 9-gallon tanks, and appreciate its size, being perfect for small tanks. They consider it easy to use and good value for money. The temperature control receives mixed feedback – while some praise the cool external temperature setting, others report it doesn’t reach the desired temperature. The sturdiness is concerning, with reports of the heater exploding or failing after 8 months of use. The ease of setup and quality also receive mixed reviews, with some finding it easy to set up while others report poor quality.
13 reviews for Mini Submersible Aquarium Heater, 25/50/100/150/200/300 Watts Adjustable Fish Tank Heater, Built-in Thermometer, External Temperature Controller, Smart Memory (10 Watts(USB))
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$9.99
jose e contreras –
Compact and Reliable Heater!
The Auomii mini submersible heater works great in my small aquarium. Heats quickly, keeps the temperature stable, and takes up very little space. Quiet, efficient, and easy to use. Great little heater!
jesse chen –
Suitable for small aquariums
I bought this for my 5 gallon tank and it heats up a little slow, still works fine in a 2.5 gallon tank.
Carol L. Mccawley –
Good heater for my 2gal
Need to preface with the fact that I have bought both the 10- and 20-watt version of these.I have a 2gal reef tank and the 20watt is a perfect little heater.The 10 watt I use to pre-heat water for water changes. At 2 gallons a water change that is not pre heated is quite the shock on the tank inhabitants.All in all, they are nice little heaters with a display that shows both the set temperature as well as the current water temperature.I will add, that at times the reading can be off by a degree or two. I think this is due to the fact that the heating element and temp sensor are in the same housing, so the reading might be taken at the same time it is heating, or at a time when it is not heating. This is a guess at best.I’ve compared it to two other reading from various thermometers (Stick on, and in tank) All three were one to two degrees off. So who knows.
Amber B –
Not to be trusted to do what it is supposed to do
It worked great! Until it didn’t work at all. And that only took a couple of days after I started using it. It now turns on but doesn’t actually heat up. I woke up to my fish tank at 63F, so that was fun.
Ayana Humphries –
What Iâm saying
Itâs small and is good for my sea monkeysAnd it comes in a small box
David Martin –
Aquarium water heater
I Like how this is small for my 5gallon fish tank , l also like how I can program what temperature I want the water heat up then it automatically shuts of.I can also see the temperature on the power cord that’s a plus . Delivery was very fast & accurate. I would recommend buy this heater for your tank depending on the size.
Wisebuyer –
Good product for the price
Good product for the price
grabemily –
Not Sucky
The suction cup is not very sucky and pulls off of the tank quite often.
Claudia Morel –
Jâai un aquarium 3 gallons et fonctionne bien.
Erika Carrillo Rodriguez –
Es funcional, pequeño, ideal para peceras pequeñas
FDNKARLA –
Hice una prueba de este mini calentador antes de ponerlo con mis tortugas para ver si funcionaba o si las podÃa quemar, pero nada de eso!!!, Es muy fácil de usar y si calienta el agua, tarda un poco , pero si la calienta, meti mi dedo en el agua que estaba con el calentador y despues en donde tengo a mis tortugas sin uno, y si hay mucha diferencia, te recomiedo comprarlo, vale mucho la pena
Mukil Madanan –
Product is only on looks. Not working. Need to contact amazon to get it returned or replaced.
Carl.l –
Dommage il Est mort apres 2 mois d’utilisation malheurement alors je donne 3 étoiles