Description
xReliable heating for your aquarium—without guesswork
The FREESEA Aquarium Heater is designed for 40 to 75-gallon tanks, supporting both saltwater and freshwater environments. With multiple wattage options (100W, 200W, 300W, 500W), you can select the right fit for your setup and keep water comfortably stable. The 110-120V design pairs with an extra-long 8.2-foot power cord for flexible placement and cleaner cord management. Note: Please refer to our size chart to choose the correct wattage for your aquarium.
Safety-first engineering you can rely on
Overheating protection automatically shuts the heater off when the water temperature climbs beyond the preset level. If the heater is exposed to air, it halts heating and displays an error, helping you prevent temperature spikes. Error codes E1 and E2 indicate out-of-water or mechanical issues, guiding quick checks.
Precise control at your fingertips
The external digital LED controller covers a 64℉–95℉ range with ±1℉ accuracy. You can adjust temperatures without opening the tank. The LED readout shows current water temperature, the target setting, and an auto shut-off alert, so you always know where you stand.
Built to last with careful design
Crafted from explosion-proof quartz glass and heat-resistant nickel-chromium wiring, the heater heats water efficiently while resisting wear. The rugged PC housing adds heat resistance and protects both your livestock and you from burns, even in busy home environments.
What you’ll experience in daily use
Imagine a stable tank environment where your fish or corals respond calmly to gradual temperature changes. The long cord enables discreet placement behind furniture or inside a cabinet. The submersible unit blends with the tank while delivering steady warmth as needed.
Why choose FREESEA
- Versatile wattage options for sizes from mid-sized to large aquariums
- Clear protection features that reduce risk of temperature drama
- Easy, external temperature control for safe adjustments
- Durable, explosion-proof glass and heat-resistant housing for long-term reliability
- Friendly after-sales support and 24-hour service
FAQ
Q: What tank size is the FREESEA Aquarium Heater suitable for?
A: Designed for 40-75 gallon tanks, suitable for both saltwater and freshwater setups.
Q: How does the safety system protect the tank?
A: It features overheating and off-water protection with clear error codes and automatic shut-off when needed.
Shipping & Return
xReturns Policy
You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).
You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).
If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.
Shipping
We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
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