AquaMiracle Mini Aquarium Heater 30W Small Fish Tank Heater for 4-6 Gal Tanks, Digital Display Thermostat Betta Heater with Dry-Run & Overheat Protection, Memory Function
Condition: New
Buy Now, Pay Later
As low as
$4
/ mo
Learn more
- – 4-month term
- – No impact on credit to apply
- – Instant approval decision
- – Secure and straightforward checkout
Ready to go? Add this product to your cart and select a plan during checkout.
Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Zip, Apple Pay, and Google Pay. No-credit-needed leasing options through Acima may also be available at checkout.
Learn more about financing & leasing here.
Selected Option
Free shipping on this product
30-day returns
Learn more
FREE 30-day refund/replacement
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
Availability:
20 left in stock
Arrives
Sunday, Aug 2
Recently Viewed
Size: ≤ 6 Gal Tanks
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 4-6 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.
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 4-6 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 : 6.02 x 3.23 x 2.09 inches; 5.61 Ounces
Date First Available : August 12, 2022
Manufacturer : AquaMiracle
Best Sellers Rank: #5,748 in Pet Supplies (See Top 100 in Pet Supplies) #9 in Aquarium Heaters
#9 in Aquarium Heaters:
Customer Reviews: 4.4 4.4 out of 5 stars 575 ratings
Product Dimensions : 0.9 x 0.9 x 2.36 inches; 2.47 ounces
Item model number : SC06A030
Date First Available : August 12, 2022
Manufacturer : AquaMiracle
Best Sellers Rank: #12,098 in Pet Supplies (See Top 100 in Pet Supplies) #19 in Aquarium Heaters
#19 in Aquarium Heaters:
Customer Reviews: 4.2 4.2 out of 5 stars (1,333)
Item Weight: 2.47 ounces
Manufacturer: AquaMiracle
Item model number: SC06A030
Date First Available: August 12, 2022
Item Package Dimensions L x W x H: 6.02 x 3.23 x 2.09 inches
Item Dimensions LxWxH: 0.9 x 0.9 x 2.36 inches
Item Weight: 70 Grams
Brand Name: AquaMiracle
Target Audience Keyword: Fish
Directions: Adults 18 years and older.
Warranty Description: 1 Year Warranty
Model Name: SC06A030
Color: Black
Size: ≤ 6 Gal Tanks
Included Components: Aquarium heater
Specific Uses for Product: Small aquarium
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Sunday, Aug 2
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.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
- Klarna Financing
- Affirm Pay in 4
- Affirm Financing
- Afterpay Financing
- Zip Pay in 4
- Financing through Apple Pay
- Financing through Google Pay
Learn more about financing & leasing here.
Similar Products
Top Amazon Reviews
Size: ≤ 1 Gal Tanks
I’ve been using this 10W one-gallon betta fish heater for my quarantine bowl, and I’m really happy with it. The adjustable temperature control is a great feature, and the built-in sensor has been accurate and consistent. It maintains the set temperature reliably, which is especially important when I’m temporarily housing sick fish and need stable conditions. I also appreciate how quiet and subtle it is. It makes no noise at all, and unlike some heaters, it doesn’t have a large, bright light that constantly changes colors. The indicator is very minimal, which I prefer since it doesn’t distract from the tank. Overall, it’s a dependable little heater and works perfectly for small setups — I would definitely recommend it.
...
show more
Reviewed in the United States on February 12, 2026 by Brittany
Size: ≤ 4 Gal Tanks
Works great for smaller tanks. I have hadn't any issues with the temperature. Easy to use. I like the fact if the electricity goes out that it keeps the same temperature it was set at prior to the electricity going out.
Reviewed in the United States on February 17, 2026 by Mowgli
Size: ≤ 2 Gal Tanks
It was very easy to install, change settings, and clean as needed. I'm using it in a 2.5 gallon tank and it works great, and has worked flawlessly for months.
Reviewed in the United States on March 22, 2026 by Mandy E.
Size: ≤ 1 Gal Tanks
Awful. I was so excited about this heater because of its perfect size for my small hospital tank. I put my sick fish in it hoping he’d finally get better, and the heater did work for a good 3,4 hours then completely stopped. Dropped back the temperature and never went up again. Returning it
Reviewed in the United States on April 2, 2026 by Rana Ebrahimi
Size: ≤ 1 Gal Tanks
I got my first of these Heaters near a month ago for my 1gal. Betta bowl. Nifty (neat and easy to use), it's been a perfect fit for the compact bowl space, with a digital control combining thermostat (to set the desired heater temp) and thermometer (to show the actual aquarium temp). Loved it so much, I then got a second one, this for my cylindrical 2gal. community tank which is home to six Guppy/Molly/Platy fishes. Yes, it is overcrowded but I closely monitor the tank's water quality and other parameters as well as the fish behavior there. And all the guys are doing well, as shown by their feeding habits, mobility, even schooling activity. Relying on these Heaters for keeping both of my minimal aquaria at an optimal 80°F I've felt confident that all is well. Until the last day or two… my apartment has cooled somewhat from its usual 75°F or so down to 68°F, nothing drastic. Yet the two heaters now seemed taxed to hold their spaces at the 80°F I've set. Each aquarium now hovers at 74°F, shown by the controls of each heater and verified by strip thermometers, one on each aquarium located up against the heater (at least for the Betta bowl). This is a mildly troubling issue on which I will update this review if warranted.
...
show more
Reviewed in the United States on February 20, 2024 by !MiMc
Size: ≤ 1 Gal Tanks
I have a small 2 gallon tank and the 10w heater works great. I love the small capsule shape, it hardly takes up any room. My tank is circular and the suction cup adheres to it just fine.
Reviewed in the United States on January 19, 2026 by J Vacanti
Size: ≤ 4 Gal Tanks
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