Compact 25W Adjustable Aquarium Heater

Why you'll love it

Keep your fish happy and healthy with precise temperature control that actually works. This compact heater fits seamlessly into smaller tanks while delivering consistent warmth your aquatic friends need.

Product Description

This 25W aquarium heater is specifically designed for 5-10 gallon tanks, making it perfect for bettas, small tropical fish, and turtle habitats. At just 4.7" (12 cm) long, it's compact enough to hide behind plants or decorations while still providing reliable heating power.

The external controller displays real-time water temperature and lets you set anything from 63°F to 94°F (17°C to 34°C) with ±1°F accuracy. When heating, you'll see a red light; when the target temperature is reached, it switches to green. The 6.5 ft (2 m) power cord gives you plenty of flexibility for placement.

Safety features include automatic shutoff if water gets too hot, plus a memory function that remembers your settings after power interruptions. The heating element uses nickel-chromium wire for faster heating, housed in thick quartz glass that's explosion-proof and crack-resistant.

Interesting Points

Smart Temperature Display

No need for a separate thermometer – the controller shows exactly what's happening in your tank in real-time, so you always know your fish are comfortable.

Compact but Powerful

Small enough to disappear into your tank design, yet strong enough to heat 5-10 gallons efficiently without taking up valuable swimming space.

Safety-First Engineering

Built-in overheating protection automatically shuts down the heater if things get too hot, while the thick quartz glass construction resists cracks and breaks.

Set-and-Forget Convenience

Memory function saves your temperature settings even during power outages, so you don't have to constantly readjust everything.

Product Specifications

• Power: 25W
• Tank capacity: 5-10 gallons
• Temperature range: 63-94°F (17-34°C)
• Temperature accuracy: ±1°F
• Heater length: 4.7" (12 cm)
• Power cord length: 6.5 ft (2 m)
• Materials: Nickel-chromium heating wire, quartz glass, ABS shell
• Compatible with freshwater and saltwater

Usage Notes

• Must be 100% submerged in water during operation
• Use with water pump or filter for proper circulation
• Before maintenance, turn off power and cool for 15+ minutes
• Suitable for fish tanks and turtle tanks

Package Inclusion

• 25W aquarium heater with heating rod
• External temperature controller
• Power cord (6.5 ft)
• User manual

Give your fish the stable, comfortable environment they deserve with a heater that's built to last and easy to use – perfect for both beginners and experienced aquarists.

Shipping and Returns

• Listed Shipping: 2–4 days.
• Returns: Returns policy.