Aqueon Submersible Aquarium Heater – Up to 55 Gallon

Keep your aquarium at the perfect temperature with the Aqueon Submersible Aquarium Heater. Built from thermal shatter-resistant quartz glass, it's designed to absorb impacts and hold up to the daily demands of tank life, making it a durable, reliable choice for both freshwater and saltwater setups.

An electronic thermostat automatically stops heating once your set temperature is reached, with precise adjustment down to 1°F between 68–88°F. A power indicator light lets you know at a glance when the unit is actively heating, and UL-approved safety features include automatic shut-off if the heater isn't properly submerged, protecting against overheating and damage — it resets automatically once conditions are safe again.

Flexible enough to position vertically or horizontally, this heater fits seamlessly into your tank setup, whether fresh or saltwater, up to 55 gallons. It comes with a 6-foot power cord for easy placement near your aquarium's power source.

Backed by Aqueon's full range of aquarium essentials — from filters to lighting to food — this heater is part of a trusted ecosystem built to support fishkeepers at every stage of the hobby.

Key Features

• Thermal shatter-resistant quartz glass construction
• Auto shut-off when overheating, auto-resets when cooled
• Electronic thermostat with 1°F precision (68–88°F)
• LED power indicator light
• UL approved with safety submersion detection
• Vertical or horizontal positioning
• Suitable for fresh or saltwater tanks up to 55 gallons
• 6-foot power cord