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Advantages
Precise Temperature Control
Maintains stable water temperatures to support the health and comfort of aquatic life.
Easy to Use
Simple installation and adjustable settings make it convenient for both beginners and skilled aquarists.
Durable and Safe Design
Built with high-quality materials to ensure safety and long-term reliability in any aquarium setup.
Choose your aquarium heater
Find the perfect heater tailored to your aquarium’s size and needs. Freesea offers a range of options to keep your aquatic environment comfortable and thriving.
Aquarium Fish Tank Heater, 50W
The Freesea 50W Aquarium Fish Tank Heater is a compact and efficient solution for maintaining the perfect water temperature in tanks from 1 to 10 gallons.
Aquarium Fish Tank Heater, 75W
The Freesea 75W Aquarium Fish Tank Heater is crafted to provide consistent and reliable warmth for aquariums ranging from 5 to 15 gallons.
Aquarium Fish Tank Heater, 100W
The Freesea 100W Aquarium Fish Tank Heater is designed to provide reliable and consistent heat for aquariums ranging from 10 to 20 gallons.
Freesea Aquarium Heater for Fish Tank, 100W
The Freesea 100W Aquarium Heater is a reliable choice for maintaining the ideal water temperature in 10-20 gallon saltwater and freshwater tanks.
Freesea Aquarium Heater for Fish Tank, 200W
The Freesea 200W Aquarium Heater is designed to keep water at the perfect temperature for tanks ranging from 20 to 40 gallons, making it ideal for both saltwater and freshwater environments.
Freesea Aquarium Heater for Fish Tank, 300W
The Freesea 300W Aquarium Heater is perfect for maintaining a consistent and safe temperature in tanks ranging from 40 to 75 gallons, ideal for both saltwater and freshwater environments.
Freesea Aquarium Fish Tank Heater, 50W
The Freesea 50W Small Submersible Aquarium Heater is designed for tanks ranging from 5 to 10 gallons, making it perfect for bettas, turtles, and other small aquatic species.
Freesea Aquarium Fish Tank Heater, 100W
The Freesea 100W Submersible Aquarium Heater is designed for tanks ranging from 10 to 20 gallons, making it ideal for turtles and a variety of freshwater and saltwater species.
Freesea Aquarium FishTank Heater: 25W/50W/100W/300W
The Freesea Small Submersible Aquarium Heater, available in 25W, 50W, 100W, and 300W models, is designed for tanks ranging from 1 to 5 gallons, making it ideal for bettas, turtles, and other small aquatic species.
Freesea 50 Watt Aquarium Submersible Betta Heater
The Freesea 50 Watt Aquarium Submersible Betta Heater is designed to provide optimal warmth for small aquariums, making it perfect for bettas and other small aquatic species.
Freesea 100 Watt Aquarium Submersible Betta Heater
The Freesea 100 Watt Aquarium Fish Tank Heater is designed to maintain the perfect temperature for medium-sized aquariums, ensuring a stable environment for your fish and aquatic pets.
Freesea 300 Watt Aquarium Submersible Betta Heater
The Freesea 300 Watt Aquarium Fish Tank Heater is designed to provide consistent and reliable heating for larger aquariums, ensuring a stable and comfortable environment for your fish and aquatic pets.
Accessories
ColorFusion Aquarium
Fish Tank Digital Thermometer
Aquarium Test Strips
Aquarium Air Pump
FAQ
The size of the heater depends on the size of your aquarium. For small tanks (1-5 gallons), a 25W or 50W heater is usually sufficient. For medium-sized tanks (10-20 gallons), a 100W heater works best. Larger tanks (20-75 gallons) may require heaters with higher wattages, such as 200W or 300W. Always choose a heater that matches your tank’s size for optimal performance.
Yes, Freesea heaters are designed to work in both freshwater and saltwater aquariums. They provide reliable heating for a variety of aquatic environments.
Many Freesea aquarium heaters come with an adjustable external controller or a digital LED display for easy temperature control. Simply set the desired temperature, and the heater will maintain that level.
Yes, Freesea heaters are built with advanced safety features such as over-temperature protection and automatic shut-off if the water level is too low. These features ensure the safety of your aquatic pets.
Freesea heaters are designed to be submersible and easy to install. Simply place the heater in the tank, ensuring it is fully submerged in water. For models with external controllers, attach the controller to the heater and adjust the temperature settings.
Ask your question
What customers are saying
I’ve been using the Freesea 100W Aquarium Heater for my 15-gallon freshwater tank, and I couldn’t be happier with its performance. The temperature control is spot-on, and I love how easy it is to monitor with the external controller. It keeps my tank at the perfect temperature all day long, and I don’t have to worry about fluctuations. My bettas and plants are thriving, and I appreciate the safety features like the automatic shut-off when the water level is low. I highly recommend Freesea to any aquarist looking for a reliable and efficient heater.
James M.
Customer
I’ve been using the Freesea 200W Aquarium Heater for my 40-gallon saltwater tank, and it’s been a game changer. The heater maintains a stable temperature, which is crucial for my fish and coral. The adjustable temperature controller is very user-friendly, and the automatic shut-off feature gives me peace of mind. I no longer have to worry about overheating or temperature fluctuations. It’s a solid, reliable product that I would definitely recommend to anyone with a mid-sized aquarium.
Michael T.
Customer
I recently purchased the Freesea 50W Aquarium Heater for my 10-gallon tank, and I’m so impressed with its performance. It heats up quickly and maintains a consistent temperature, which is perfect for my bettas. The digital LED controller makes it easy to set the right temperature, and I love the safety features, especially the automatic stop when the water level is low. My fish are happier and healthier, and I feel confident knowing I’m using a high-quality, reliable product.
Emily R.
Customer
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