Ensure a stable and optimal water temperature for your aquarium with the Xilong L-399 300W Aquarium Heater. Designed for precision and reliability, this high-performance heater provides consistent heating, making it ideal for maintaining a healthy environment for tropical fish and aquatic life.

✨ Key Features

🔹 Powerful 300W Heating Capacity
Ideal for medium to large aquariums, delivering fast and efficient heating to maintain a consistent water temperature.

🔹 Adjustable Thermostat Control
Built-in thermostat allows you to easily set and regulate the desired temperature for your aquarium.

🔹 Accurate Temperature Maintenance
Maintains stable water temperature, helping reduce stress and promoting fish health.

🔹 Fully Submersible Design
Safe for complete underwater operation, ensuring efficient heat distribution throughout the tank.

🔹 Durable Heat-Resistant Glass
Constructed from high-quality, explosion-resistant glass for long-lasting durability and safety.

🔹 LED Indicator Light
Integrated indicator shows when the heater is actively heating, allowing easy monitoring.

🔹 Easy Installation with Suction Cups
Comes with strong suction cups to securely attach the heater inside the aquarium.

🐠 Suitable For

• Freshwater aquariums
• Saltwater aquariums
• Medium to large fish tanks
• Tropical fish requiring stable warm temperatures

⚙️ Product Details

• Brand: Xilong
• Model: L-399
• Type: Aquarium Heater
• Power: 300W
• Temperature Control: Adjustable thermostat
• Installation: Fully submersible
• Material: Heat-resistant glass
• Indicator: LED heating light

📦 Package Includes

• 1 × Xilong L-399 Aquarium Heater (300W)
• 2 × Suction cups
• User manual

💡 Benefits

• Keeps aquarium temperature stable and safe
• Supports fish health and activity
• Easy to install and operate
• Reliable and energy-efficient performance
• Suitable for professional and home aquariums

📝 How to Use

1. Fully submerge the heater in water before turning it on
2. Fix it securely using suction cups
3. Set the desired temperature using the control dial
4. Place near water flow for even heat distribution
5. Monitor temperature regularly with a thermometer

⚠️ Safety Tips

• Never turn on the heater 
• Always unplug before removing from aquarium
• Ensure full submersion during operation
• Keep away from gravel or decorations that may block heat