Submersible Aquarium Heater with LED Controller

Bring Steady Warmth to Your Underwater World

Make daily aquarium care easier with the Hygger HG043 submersible aquarium heater. An external LED controller lets you check the water temperature and adjust the setting without reaching into the tank, so you can spend more time enjoying the movement and color of your underwater world.

Designed for freshwater and saltwater aquariums, this double-quartz heater combines adjustable temperature control with warning indicators and automatic shutoff features.

Choose your option carefully: This listing offers seven selections across 300W, 500W, 800W, and 1000W sizes. Wattage, recommended tank capacity, and appearance vary by selection.

Everyday Control & Monitoring

• External LED display: Shows current water temperature, set temperature, power, and warning indicators.
• Adjustable warmth: Temperature settings range from 59°F–93°F (15°C–34°C).
• Temperature alerts: High- and low-temperature warnings help flag conditions that need attention; overheat protection stops heating.
• Out-of-water shutoff: Stops heating when the heater detects insufficient submersion.
• Double-quartz construction: Nickel-chromium heating elements sit inside a protective guard.
• Setting memory: Retains the previous temperature setting after a power interruption.

Choose the Size for Your Aquarium

• 300W: Listed for 40–80 gallons
• 500W: Listed for 65–135 gallons
• 800W: Listed for 80–220 gallons
• 1000W: Listed for 130–260 gallons

These are the listed capacity ranges. Room temperature, target water temperature, and your aquarium setup can affect heating requirements. Review the selected variant and its instructions before ordering.

Product Details & Setup

• Model: Hygger HG043
• Power supply: 110–120V corded electric
• Listed heater length: approximately 10.8 inches; confirm dimensions for your selected option
• Listed combined cable length: approximately 10.1 feet
• Listed package contents: heater, digital controller, controller holder, three suction cups, hook, and user manual

Important: Fully submerge and secure the heater before connecting power, and follow the instructions for your selected model. Keep it clear of substrate and decorations to allow water circulation. Unplug and allow it to cool before water changes, cleaning, or removal. Automatic shutoff does not eliminate residual heat.