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(updated on Jul 12,2024 16:04:58 UTC – Details)
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FREESEA is always dedicated to innovate and optimize our products and has a professional after-sales team.
We are committed to bring high-quality and stable aquarium supplies and the best after-sales service for each aquarium enthusiast.
FREESEA is the most professional aquarium shop you can trust.
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World-renowned brand, industry benchmarkProfessional indoor and outdoor aquarium manufacturer
How did we get our start?
The FREESEA team was started in 2005. We have been in the field of aquarium for more than ten years with the most professional team and first-class after-sales service.
What makes our products unique?
We have our own R&D team and factory. Each product is independently developed and designed by our team, and has applied for a patent, which is unique in the market.
What problem are we solving?
FREESEA products are rigorously tested and used for a long time before being available in bulk. We focus on providing quality products and services.
Product Dimensions : 5.3 x 2.9 x 1.8 inches; 3.84 ounces
Item model number : Aquarium Heater
Date First Available : August 15, 2023
Manufacturer : FREESEA
ASIN : B0CFQDPQ8Q
FREESEA Aquarium Heater: 25w betta fish heater, voltage: 110~120V, is suitable for use in 1-5 gal betta fish turtle tanks and aquariums and easy to hide in small tank. The power cord is 3.9ft, long enough for indoor use
Safe And Durable: The betta heater uses a rubber sealing layer, which ensures that it has better sealing and safety performance, and will never leak electricity or water. With quartz glass, it is more sturdy and durable
Auto Constant Temperature: When the water temperature is lower than 78℉, the turtle tank heater starts to heat and the red light is on. When the temperature reaches 78℉, the heater stops heating and the green light is on
Cautions: Please ensure the betta tank heater is 100% submerged into the water before plug in the power. Please unplug the power and cool down the heater for 10-20 minutes before taking it out
Excellent service: We promise to provide high quality products and better service, if you have any questions about the turtle heater received, please contact us
Product Review: FREESEA Aquarium Fish Tank Heater
Features:
FREESEA Aquarium Heater: 25w betta fish heater, voltage: 110~120V, is suitable for use in 1-5 gal betta fish turtle tanks and aquariums and easy to hide in small tank. The power cord is 3.9ft, long enough for indoor use.
Safe And Durable: The betta heater uses a rubber sealing layer, which ensures that it has better sealing and safety performance, and will never leak electricity or water. With quartz glass, it is more sturdy and durable.
Auto Constant Temperature: When the water temperature is lower than 78℉, the turtle tank heater starts to heat and the red light is on. When the temperature reaches 78℉, the heater stops heating and the green light is on.
Cautions: Please ensure the betta tank heater is 100% submerged into the water before plug in the power. Please unplug the power and cool down the heater for 10-20 minutes before taking it out.
Benefits:
– Easy to hide in small tanks
– Safe and durable construction
– Automatically maintains constant temperature
– Long power cord for convenient indoor use
– Provides better sealing and safety performance
Drawbacks:
– Some users reported issues with temperature accuracy
– May not be suitable for larger tanks
User Testimonials:
“I have been using the FREESEA Aquarium Fish Tank Heater for my betta tank and it works great. The temperature stays constant and my fish seem happy.” – Sarah
“I had some trouble with the temperature settings initially, but after contacting customer service, they were able to help me resolve the issue quickly. Overall, I’m satisfied with the product.” – John
Comparison:
The FREESEA Aquarium Fish Tank Heater is similar to other small submersible water heaters on the market, but stands out for its durable construction and auto constant temperature feature. It may be more suitable for smaller tanks compared to similar products.
FAQs:
Q: Can this heater be used in saltwater tanks?
A: Yes, the FREESEA Aquarium Fish Tank Heater is suitable for use in both saltwater and freshwater tanks.
Q: What is the warranty on this product?
A: The manufacturer provides a warranty for this heater, please contact them for more information.
Conclusion:
The FREESEA Aquarium Fish Tank Heater is a reliable and durable option for small tanks, providing a constant temperature for your fish or turtles. While there may be some minor drawbacks, overall it offers good value for its price.

Customers say
Customers like the adjustability of the water heater. They say it allows them to set the accurate temperature and maintain it. They appreciate the option to switch between Fahrenheit and Celsius. However, some customers have reported issues with the accuracy of the thermometer. They also dislike the quality and durability. Opinions are mixed on the heat, performance, and temperature gauge.
AI-generated from the text of customer reviews