SEAOURA Small Aquarium Heater, 25W Mini Fish Tank Heater 1-5 Gallon Tank, Adjustable Turtle and Betta Heater with LED External Controller for Freshwater Saltwater

From the brand

SEAOURA Aquarium Heater

We use technology to guard every degree of warmth, make products that reassure aquarium creatures.

We are committed to providing innovative and reliable products for aquarium hobbyists and professional fish keepers.

Our goal is to satisfy everyone’s need to enjoy the fun of aquariums.

From research and development, to production, to sales, we use 100% of our efforts. Whether you are a hobbyist who loves to observe fish, or a professional fish keeper, we offer a variety of products to meet your needs.

SEAOURA Aquarium Heaters

Large Aquarium Heater (14in)

Aquarium Heater (10.4in)

Fish Tank Heater(9.5 in)

Small Aquarium Heater (5.7in)

Mini Aquarium Heater (4.7in)

SEAOURA Aquarium Air Pump

< 30 gallons fish tank

Outdoor live bait aerator

Package Dimensions ‏ : ‎ 7.91 x 2.76 x 1.65 inches; 7.83 ounces
Item model number ‏ : ‎ SR-318-25W-DE
Date First Available ‏ : ‎ March 3, 2026
Manufacturer ‏ : ‎ SEAOURA
ASIN ‏ : ‎ B0GGZDMMM6
Best Sellers Rank: #28,128 in Pet Supplies (See Top 100 in Pet Supplies) #48 in Aquarium Heaters
Customer Reviews: 4.3 4.3 out of 5 stars (59) 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); } }); });
【Dual safety protection】The small aquarium heater automatically powers off and triggers an alarm when removed from water, preventing dry burning and potential dangers. It features adjustable over-temperature protection (personalized MAX and MIN temperature threshold). Multi-zone temperature probes ensure full water temperature detection (must be fully submerged)
【Mini Heater Specifications】25W fish tank heater provides stable and efficient heating for 1–5 gallon tanks. Dimensions: 5.7×1×0.87 inches. Power cord: 3.3 ft + 5.25 ft; sensor cord: 11.8 inches. Temperature range: 63–94°F (17–34°C). It can be easily hidden in aquascaping to meet different placement needs and keep the tank aesthetically pleasing
【Dual LED display & Easy Setup】Say goodbye to the vague indicator lights of traditional heating rods! The external smart controller is equipped with a high-definition dual digital display, showing real-time water temperature and set temperature. Recognize status by color: red means heating, white means heating completed. Easy for adults and kids to operate without reaching into the water
【0.1℉ Precision Temperature Control】Short press to adjust ±0.1°F/℃, long press for fast ±1°F/℃. Built-in high-sensitivity sensor monitors water temperature in real time for stable and accurate heating, creating a healthy environment for bettas, tropical fish, ornamental shrimp, turtles and aquatic plants, reducing stress from temperature fluctuations
【Intelligent Memory Function】No need to reset after a sudden power outage! Built-in smart memory chip automatically restores the last set temperature when powered on, saving you from repeated settings. Suitable for both beginners and experienced aquarium hobbyists
【Wide Application & Durable】This submersible aquarium heater is made of explosion-proof quartz with a sturdy heat-resistant ABS shell, preventing glass breakage and protecting fish from scalds or scratches. Shock-resistant, easy to clean and long-lasting. Ideal for freshwater tanks, saltwater tanks, turtle tanks, planted tanks, pet fountains and plant seedling propagation