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YukiHalu Small Aquarium Heater 25/50/100/150W with Protective Cover, Mini Fish Tank Heater, External Controller, Temperature Adjustable, Digital Display, Used for 5/10/20/30 Gallons (25W-5Gallon)

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Availability: In Stock.
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Arrives Monday, Oct 26
Order within 3 hours and 28 minutes
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Size: 25W-5Gallon


Features

  • 25W mini aquarium heaterIt is designed for 1-5 gallons aquarium tank. Temperature can be accurately adjusted from 64 to 93F. This heater works well in both saltwater and freshwater. Rated voltage 100-130V.
  • Super small size heater with protective caseOnly 4.6 inches long for 25W/50W heater, 5.9 inches for 100W/150W. Very compact size. Takes up less space, easy to install and easy to hide in the tank. Suitable for mini fish tank. It comes with a protective case to keep your aquatic pet and you from getting burned. Shatter-proof, shock and vibration resistant.
  • Automatic maintain a consistent temperatureBuilt in thermostat with 1F accuracy. It keeps a constant temp in the aquarium. It adopts PID control strategy, so the temperature fluctuation range can be reduced to 1F. The heating is automatically stopped when the set temperature is reached.
  • Easy to adjust and readoutThe external controller with LED digital display and setting button helps us to easily read and change the temperature. The heater has a memory function and will remember the temperature setting. No need to reset the temperature after power lost. It also has an option to switch between Fahrenheit and Celsius by pressing and holding the button.
  • Overheating protection, lack of water protection Automatic shut-off when the water level gets to low or overheating. Protect the aquatic pet, and never cook your fish. Very safe in daily use.

Product Dimensions ‏ : ‎ 4.6 x 1.1 x 1.1 inches; 7.37 ounces


Date First Available ‏ : ‎ August 14, 2023


Manufacturer ‏ : ‎ YukiHalu


Best Sellers Rank: #113,204 in Pet Supplies (See Top 100 in Pet Supplies) #234 in Aquarium Heaters


#234 in Aquarium Heaters:


Customer Reviews: 4.3 4.3 out of 5 stars (163)


Item Weight: 7.4 ounces


Manufacturer: YukiHalu


Date First Available: August 14, 2023


Item Package Dimensions L x W x H: 5.98 x 4.25 x 2.13 inches


Item Dimensions LxWxH: 4.6 x 1.1 x 1.1 inches


Brand Name: YukiHalu


Target Audience Keyword: Fish


Directions: 1, The device must be used under rated voltage 100-130V. 2, 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. 3, Unplug the power and wait for 15 minutes or above before changing water or remove heater. 4, Place the heater in the way of water flow and don't bury it.


Warranty Description: 30 days full-refund, 12 months replacement


Size: 25W-5Gallon


Material: plastic


Care Instructions: When there is moss or other dirty on the heater surface, it needs to remove the protective case and clean the internal heating rods with soft brush in time.


Breed Recommendation: turtle tetra betta tortoise fish aquatic pet


Specific Uses for Product: Heat pet's drinking water to prevent freezing, Heating pond water, Keep a consistent temperature in aquarium, heating the water


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Oct 26

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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Top Amazon Reviews


  • Pretty good little heater
Size: 25W-5Gallon
This heater was easy to use and understand. The water temp is consistently 2.3 degrees higher than then what I have it set for but that might be because it’s a small tank. Other than that it works well and there is no noise and seems to be built sturdy. Good value for the money.
Reviewed in the United States on October 24, 2024 by Rachel Brown

  • Good quality and a good price too
Size: 25W-5Gallon
Much better than the heaters I buy from Petsmart. Unlike those, it’s temperature is consistent, no drops in temperature or at least significant ones and luckily, I have a black background so it won’t be an eyesore.
Reviewed in the United States on March 29, 2026 by Jeremy Chen

  • Failed after 40 days
Size: 25W-5Gallon
Initially seemed to work fine in my 3 gallon Betta tank. Then failed with persistent E1 code that won’t clear. **** Company followed up my review with a full refund offer. Good customer service.
Reviewed in the United States on November 1, 2024 by Greg Cannistraci

  • Dependable
Size: 25W-5Gallon
I really like this heater. It’s dependable on keeping my aquarium temperature at a certain point. The temp gauge is a little off but easy to work with. I’ve had it for a couple of weeks now.
Reviewed in the United States on November 22, 2025 by Deb

  • Small and effective
Size: 25W-5Gallon
Small enough to fit in my 2.5g beta tank and has reliably held temperature without killing my fish.
Reviewed in the United States on November 18, 2024 by Michele

  • Stuck in safety mode.
Size: 25W-5Gallon
I bought those back January 4th 2025. It worked great up until now. It's stuck in safety mode and smart warming up my tank. Still looks like it's in good condition. It sets right under my bubble AirStone to move the water around it. Wasn't planning on buying a tank heater every year. 😡
Reviewed in the United States on September 24, 2026 by Dayna

  • Doesn't work
Size: 25W-5Gallon
This heater doesn't work at all. Don't waste your money.
Reviewed in the United States on September 8, 2026 by Rachel

  • Tiny, great for nano tank
Size: 25W-5Gallon
I did just receive this today, so I can’t speak to longevity. It does fit so much better in my 3 gallon rimless shrimp tank than the smallest heater I could find at my local pet store. I have a hygger on my 29 gallon that of course is huge, but this little heater has the external control and thermometer just like my hygger. I really like that, so convenient to change the temp without taking out the device and fiddling with a knob on the top, and it shows the actual aquarium temp in large clear numbers. I will update this review if I encounter any issues with the device, I’m hoping not. ... show more
Reviewed in the United States on June 28, 2024 by debzstuff

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