SEAOURA 200W Aquarium Heater for 30-40 Gallons | Submersible, LED Controller, Auto Power-Off

Reliable warmth for your 30-40 gallon aquarium

Meet the SEAOURA 200W aquarium heater, designed to deliver steady warmth in larger tanks. The 200W rating is well-suited for tanks in the 30-40 gallon range, helping tropical fish, turtles, and reef-inspired setups feel at home. A temperature probe runs to the heating rod, enabling temperature readings in multiple areas of the tank and a more complete picture of heat distribution.

Smart control you can rely on

The external controller lets you set the target temperature with precision. A large LED display mirrors the current tank temperature, the set temperature, and heating status in real time, so you can respond quickly if adjustments are needed.

• Temperature probe wire connects to the heater, enabling measurements across the tank for more accurate readings.
• External controller for safe, convenient temperature adjustments while the heater remains submersed.
• Includes suction cups to secure both the heater and probe, preventing drift and misreadings.

Safety-first design and durable build

Over-temp protection automatically stops heating if the water gets too warm, or if the heater or probe is exposed to air. An alarm sounds to remind you to check the tank. The 10.4-inch heater, with long cords (37.4 inches plus 59 inches), offers flexible placement.

• Automatic power-off when exposed to air helps reduce risk in crowded or busy tanks.
• Memory function restores the last set temperature after a power outage, saving your preferred settings.
• 0.1°F/0.1°C precision and quick ±1°F/±1°C adjustments make it easy to dial in the right warmth.

Clear readings and broad compatibility

The LED digital display clearly shows current temp, set temp, and heating status: red indicates heat is active, white when at target. Temperature range is 63-94°F (17-34°C), suitable for freshwater, saltwater, and reef-inspired aquascapes.

• Memory-ready and user-friendly interface supports hobbyists and busy homes alike.
• Thick quartz heating tube and ABS housing resist impact and water pressure for long-lasting use.

What you get

SEAOURA’s 200W heater is a complete solution for larger tanks, bringing warmth with precision while staying easy to monitor and maintain.