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AquaMiracle

AquaMiracle Adjustable 20W Small Aquarium Heater Submersible Fish Tank Heater Betta Heater Turtle Heater Super Mini Aquarium Heater with Digital Display Thermostat, for 2-4 Gallon Tanks

    • Based on 1,061 reviews
Condition: New
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Availability: 20 left in stock
Fulfilled by Amazon
Arrives Monday, Apr 28
Order within 23 hours and 6 minutes
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Size: 20W


Features

  • SUPER MINI SIZE This small aquarium heater is thumb size - only 2.36 (6cm) in length. Great for nano tanks / betta tanks. The innovative super mini size perfectly solves the headache of the fish keepers on the traditional heaters! Takes up less space, easy to hide, but in full power! Temperature range is 64-93F, for 2-4 Gallon tanks.
  • ACCURATE TEMPERATURE Thanks to the intelligent inverter technology, with the in-built chips this thermostat keeps the heater at a constant temperature at an accuracy of 1F, much more accurate than the traditional knob-controlled heaters. The thermostat shows 2 readings the current temperature and the set temperature very easy to operate.
  • DRY RUN / OVERHEATING PROTECTION Full consideration of safety. With the multiple protections this fish tank heater will stop working when the water level is lower than the minimum water level or when the water temperature exceeds 97F. You are free from cooking fish!
  • MEMORY FUNCTION The last setting is stored in the thermostat. In case of a power cut, when the power recovers the heater will follow the last setting.
  • MULTIPLE USES This heater can be used for both fresh and marine water. It can be not only used as an aquarium heater, but can also work for turtles, pet fountains, and plant seedling.

Package Dimensions ‏ : ‎ 5.94 x 3.23 x 2.05 inches; 5.29 ounces


Item model number ‏ : ‎ SC06A020


Date First Available ‏ : ‎ August 12, 2022


Manufacturer ‏ : ‎ AquaMiracle


Best Sellers Rank: #10,343 in Pet Supplies (See Top 100 in Pet Supplies) #21 in Aquarium Heaters


#21 in Aquarium Heaters:


Customer Reviews: 4.2 4.2 out of 5 stars 1,061 ratings


Item Weight: 5.3 ounces


Manufacturer: AquaMiracle


Item model number: SC06A020


Date First Available: August 12, 2022


Item Package Dimensions L x W x H: 5.94 x 3.23 x 2.05 inches


Brand Name: AquaMiracle


Target Audience Keyword: fish


Color: Black


Size: 20W


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Apr 28

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.

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Similar Products

Top Amazon Reviews

    • Doing its job!
Size: 10W(USB)
The media could not be loaded. I absolutely love this little heater! It’s the perfect size for my betta tank, and it does exactly what it promises. The adjustable temperature feature is spot-on, and it holds the temperature consistently without any fluctuations. I was pleasantly surprised by how reliable it is for such a compact heater. It’s discreet, easy to install, and doesn’t take up much space in the tank. If you’re looking for an affordable and efficient heater for your betta or small aquarium, this is definitely the one! I’ve attached a video showing how well it works in my tank. ... show more
Reviewed in the United States on December 15, 2024 by Elizabeth
    • Tiny heater does the job
Size: 10W
Perfect for small tanks or jars, I use it for my 1gal tank with fresh fry and it works perfectly, easy to set temperature, truly convinient to use. Wish the cord would be longer.
Reviewed in the United States on January 19, 2025 by Martin
    • Tiny yet mighty!
Size: 20W
Review Image by Louie King Louie King
Review Image by Louie King Louie King
Review Image by Louie King Louie King
Review Image by Louie King Louie King
Review Image by Louie King Louie King
Sam, our unexpected Betta fish birthday gift for our 7-year-old, quickly became a beloved member of our family. To ensure his happiness and comfort in his new home, we had to learn the ropes of Betta care. It was surprising to discover that these little fish, often sold in deli containers at pet stores, require a considerable amount of care. During our research, we learned that Betta fish thrive in water temperatures between 78 to 82 degrees Fahrenheit, and achieving this meant we needed 5 watts of heating power per gallon. That's why we found the 20-watt heater to be a perfect match for our 4-gallon tank. This compact heater was an ideal solution for our uniquely shaped round tank, where our only option was a fully submersible heater. Many other models we came across were bulky and had no suitable attachment points. However, this heater's strong suction cup allowed us to discreetly position it near the rim of the tank, preserving the tank's aesthetics. Not only has it maintained a consistent water temperature of a perfect 80 degrees, but it's also safe to touch, as Sam often swims close to it without harm. One feature we appreciate is the easily visible digital display, which helps us monitor the temperature and ensure Sam's safety. However, my one concern is the auto-shutoff setting, which is set at a rather high 97 degrees. Knowing that Bettas cannot survive in water temperatures exceeding 86 degrees, I can't help but worry about the possibility of returning home to an overheated tank. ... show more
Reviewed in the United States on October 21, 2023 by Louie King Louie King
    • Great Customer Service
Size: 10W(USB)
**Updated Review** This seller immediately responded to my review and sent me a replacement. My replacement heater works great and I am very happy with it! My original heater plugged into a USB port, the new one has a normal two-prong plug. I'm not sure if that's what made the difference but the new one works really well. Thank you seller!! So sad that this product does not work. I bought it for my 1 gallon, small fish bowl to keep my beta warm as we live in cold climate. I have had it set to 79F for 24 hours and so far it hasn’t gotten warmer than 74F. Additionally, I used a thermometer to test the water temp and it read 4 degrees colder than the display was reading on this thing. Very frustrating. Save your money. ... show more
Reviewed in the United States on January 7, 2024 by Hannah Johnson
    • Barely does anything
Size: 30W
Bought the 30w heater for my 6 gallon cube. I had it set to 76 while I was cycling the tank. Put a thermometer into my tank after 2 weeks and it read 72 degrees. So I assume that it's just inaccurate and raised the set point to 86 degrees. Guess where that got me after 30 hours? You're right! 74 whole degrees! You know what the ambient temperature in my house is? You guessed it! 74 degrees! This thing can't even take the 6 gallon nano cube over ambient temperature? Or should easily be able to atleast keep it 5 degrees warmer than my house. Waste of money, I don't suggest buying this. The built in thermostat on it it says it's at 82.5 degrees but the tank is at 74 degrees i have to throw an a 50w heater in now. I had high hopes because I really wanted something easy to hide in my nano tank, no I get to slap a huge 50w heater in there in complete disappointment. I can't even send it back because I'm past the return window now. But I don't even think this 30w heater could maintain a 3 gallon tank. Manufacturer feel free to get in contact with me about your worthless product. Either you have absolutely no quality control/testing or your just pushing a product that you know is garbage and won't work right. I usually ignore bad reviews when I read them but everyone else with the same issue is spot on. ... show more
Reviewed in the United States on October 15, 2024 by Calamity
    • Nicely adjustable...
Size: 20W
Works well for my little 2.5 gallon nano tank that I use for a beta and plant. And that it is digitally adjustable makes it even better. Also comes with a suction cup clip to attach inside your tank. Don't expect major temp changes but it will adjust up a few degrees in 5 gallon or smaller tanks. The heating glass is exposed so be sure your fish/snails/shrimp/critters can easily get away from it's glass if it kicks on when they are attached to it. Nice little heater that's easy to setup and use with big temp numbers you can see from across a room. For very small tanks only. ... show more
Reviewed in the United States on November 15, 2024 by Don Gray
    • In-line temperature control
Size: 10W
Perfect for my small betta tank. Love the in line temp control
Reviewed in the United States on January 24, 2025 by Joe S. Davis

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