100W–500W Submersible Aquarium Heater with Adjustable Thermostat for Fish Tanks

Ensure a stable and comfortable environment for your aquatic pets with this fully submersible aquarium heater. Designed for use in both freshwater and marine aquariums, it features adjustable temperature control, a durable shatter-resistant glass body, and a protective heat guard. The built-in thermostat offers precise manual temperature adjustment from 13°C to 34°C (55°F to 92°F), helping maintain consistent water temperature throughout the tank. With an intermittent heating cycle, the device reduces overheating and improves lifespan.

Its dual suction cups provide a secure hold to tank walls, and the 1.9-meter extended power cord offers convenient placement flexibility.

Features

• Fully submersible glass heater for freshwater and saltwater tanks

• Manual temperature control ring (13°C to 34°C / 55°F to 92°F)

• Explosion-resistant glass with protective outer shell

• Built-in indicator light shows heating status

• 7–8 minute heating + 2 minute pause cycle for more stable operation

• Strong suction cups for secure mounting

• Extended 1.9m power cord for convenient installation

• Available in 100W / 200W / 300W / 500W models to suit various tank sizes

Specifications

• Material: Shatterproof glass + ABS cover

• Voltage: 220–240V / 50–60Hz

• Temperature Range: 13°C–34°C (55°F–92°F)

• Power Cord Length: Approx. 1.9m

• Heater Diameter: Approx. 2.2cm

• Heater Lengths:

  • 100W: 25 cm (for 50–100L tanks)

  • 200W: 29 cm (for 100–150L tanks)

  • 300W: 33 cm (for 150–200L tanks)

  • 500W: 37 cm (for 200–300L tanks)

Package Includes

• 1 × Aquarium Glass Heater (CN plug or CN plug + AU adapter)

• 2 × Suction Cups

Notes

• This product uses a Chinese standard plug (CN plug) by default.

• You can choose from the following options in the listing:

  • Heater with CN plug

  • Heater with CN plug + AU adapter

  • AU adapter only (no heater included)

• Please make sure to select the correct variation before purchasing.

• The heater must be fully submerged in water during use.

• Unplug the heater at least 15 minutes before changing water or removing it from the tank.

• Allow 1–3 cm difference due to manual measurement. Slight colour variation may occur due to lighting or screen.

• Regular cleaning is recommended for optimal performance and longevity.