Description
xCompact, reliable warmth for 10-20 gallon tanks
The Hygger Small Submersible Aquarium Heater is a purpose-built 100W solution that tucks neatly into tight spaces behind décor, filter, or rockwork. Its slim profile measures 4.3 inches long by 1.8 inches wide and 0.9 inch thick, so it sits discreetly in either freshwater or saltwater setups, including betta tanks, planted aquariums, and even turtle enclosures.
Active temperature control is delivered via a clear LED display that shows real-time water temperature and the heater’s status. When the heater is actively warming, a red indicator glows; when the target temperature is reached, a green light signals readiness. This at-a-glance feedback can help you keep your tank on an intuitive schedule without guesswork.
Precise control you can rely on
Set the temperature across a broad range of 59°F to 93°F (15°C to 34°C) in 1-degree increments. A memory function recalls the last setting, so power outages don’t force you to reconfigure the thermostat every time you flip the power back on. The external control makes adjustments convenient without wet hands.
- External control reduces handling in cold rooms or during winter maintenance
- 1-degree step granularity helps you approach specific habitat targets
- LED readout provides instant visibility while monitoring water quality
Built with safety and durability in mind
Durability and safety are central to the design. The 100W heater uses a shatterproof quartz tube wrapped with mica plates and nickel wiring, housed in a high-impact plastic shell. A protective, two-suction cup mounting system keeps the unit in a stable position, and a rugged guard reduces accidental contact with the heater while fish, turtles, or invertebrates share the tank with you.
Safety features include an automatic shut-off if the unit is not fully submerged, helping prevent overheating. If the display detects abnormal conditions, an error indicator can guide you to address the issue before it affects your livestock.
Flexible use and practical setups
Whether you maintain a freshwater community tank, a dedicated betta habitat, a planted tank, or a small saltwater reef, this heater adapts to your needs. Its compact footprint makes it easier to position near filter outlets, rocks, or décor without crowding the aquascape.
What you get is a dependable heating companion that supports stable conditions for a range of species and setups. Always follow general aquarium care best practices, monitor water parameters regularly, and adjust the heater as your tank evolves.
Specs at a glance
- Power: 100W
- Tank compatibility: 10-20 gallons
- Temperature range: 59°F–93°F in 1° increments
- Indicators: red heating, green target reached
- Submersion safety: automatic shut-off
- Construction: shatterproof quartz tube, mica plates, nickel wire
- Mounting: two strong suction cups, compact profile
FAQ
Q: What tank size is this heater best suited for?
A: Best for 10-20 gallon freshwater or saltwater aquariums.
Q: Does it remember the temperature after a power outage?
A: Yes. The memory function recalls the last setting for quick recovery.
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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