







🔥 Keep your mini aquatic world perfectly cozy—smart heating, zero hassle!
The auomii Small Submersible Aquarium Heater (25W) is a compact, quartz-built device designed for 3-5 gallon tanks. It features an external LED temperature controller for precise, hands-free adjustments and real-time monitoring. With smart memory and automatic shutoff to prevent overheating or dry-run damage, it ensures a safe, stable environment for your fish. Ideal for professional hobbyists seeking reliable, easy-to-install aquarium heating with advanced safety features.











| ASIN | B0BDKPVC6X |
| ASIN | B0BDKPVC6X |
| Best Sellers Rank | #23,614 in Pet Supplies ( See Top 100 in Pet Supplies ) #56 in Aquarium Heaters |
| Brand Name | auomii |
| Breed Recommendation | tortoise turtle tetra betta fish |
| Care Instructions | 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 |
| Color | black |
| Customer Reviews | 4.3 4.3 out of 5 stars (423) |
| Date First Available | September 8, 2022 |
| Date First Available | September 8, 2022 |
| Directions | The heater must be fully submersed into the water. The external temperature controller must be kept away from the water as it is not waterproof. |
| Included Components | Submersible Aquarium Heater |
| Item Package Dimensions L x W x H | 5.98 x 4.21 x 2.05 inches |
| Item Weight | 7.8 ounces |
| Item model number | AU-001 |
| Item model number | AU-001 |
| Manufacturer | auomii |
| Manufacturer | auomii |
| Material | quartz |
| Model Name | Submersible Aquarium Heater |
| Package Dimensions | 5.98 x 4.21 x 2.05 inches; 7.83 ounces |
| Size | 25 Watts |
| Specific Uses for Product | Heating pet drinking water, Prevent pet's drinking water from freezing, constant water temperature, external temperature controller |
| Target Audience Keyword | fish |
A**N
Good little heater 5watt usb
The heater works well with Ziss brine shrimp hatchery. Holds a consistent 78 degrees +- .5 degrees. Buying another for a second hatchery
R**Y
The best to isolated a fish or a small fish tank
It’s so awesome to have this because you have built in temperature checking it’s definitely value for your money
S**N
Great little heater
Great little nano heater for my nano tanks. I have a 3 gallon. I mainly like the size and that it uses a usb port which I have usb hub and running multiple usb heaters for my tanks. So far no issues with this product and would recommend for nano sized tanks.
K**B
A little confusing to set
Seems to be working fine, love the size but setting temp was confusing to me. In the first couple of days I constantly checked temp which drove me crazy but seemed I did it right. My first outside of the tank temp controller and love that, no more searching for my glasses lol. So far happy and so are my fish. Will update in life of the heaterw if needed. Took off one ⭐ because of the temp setting confusion.
X**M
Fishy is happy.
My Betta was suffering from dropsy and septicemia, because of cold, dirty water, that happened while I was in the hospital for something. I gave him some Betta fix, and a salt treatment, and this heater, and he's bounced back. The heater keeps the water at a constant, comfy, 80°, and doesn't take up a lot of room in the tank. Beelzebubbles, is a happy fishy again.
S**A
Over heated melted the cube
Dangerous! It over heated and melted the cube after two and a half months of use. Got a new cube and tried again, the cube didn't over heat but it fried its own system out and stopped working. The first cube could have been a fire hazard if I didn't catch it before I left on my business trip.
K**Y
Great!!!!
Works great but twice as long as the discription says for the 100w… just fits 16gall on orb tank!!! Perfect temp!!
A**R
Had no issues - good heater, small tank
Good for a small 1 to 1/2 gallon tank
C**L
J’ai un aquarium 3 gallons et fonctionne bien.
E**Z
Es funcional, pequeño, ideal para peceras pequeñas
F**A
Hice una prueba de este mini calentador antes de ponerlo con mis tortugas para ver si funcionaba o si las podía 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
M**N
Product is only on looks. Not working. Need to contact amazon to get it returned or replaced.
C**L
Dommage il Est mort apres 2 mois d'utilisation malheurement alors je donne 3 étoiles
Trustpilot
2 weeks ago
2 days ago