Maintain a clean and healthy aquatic environment with this high-performance UV Light Sterilizer, designed specifically for aquarium and fish tank use. Crafted with a durable quartz glass tube, it ensures high ultraviolet ray transmission for effective sterilization, helping to control harmful bacteria and algae growth. Its safe, waterproof design allows for full submersion in the filter tank, providing reliable and energy-efficient sterilization to keep your water clear and bright. Key Features: · High-Quality Quartz Glass Tube: Provides superior ultraviolet ray transmission for efficient sterilization and long-lasting performance. · Energy-Saving Filament: High-quality filament delivers powerful UV output while minimizing energy consumption. · Fully Submersible & Waterproof: Safe waterproof construction allows the sterilizer to be used fully submerged in the filter tank for optimal effect. · Adjustable Positioning: Equipped with strong suction cups to easily secure and adjust the sterilizer’s placement inside the tank or filter. · Effective Bacteria Control: Ideal for reducing malignant bacteria and controlling algae growth, promoting a healthier aquatic environment. Specifications: · Body Material: Quartz Glass · Plug Type: EU Plug · Voltage: AC 220-240V · Frequency: 50/60Hz · Wattage Options: 5W / 7W / 9W / 11W / 13W (Optional) · Power Cable Length: Approx. 200cm (78.7 inches) · Tube Diameter: 19mm (0.75 inches) · Lamp Body Length:  - 5W: 195mm (7.67 inches)  - 7W: 200mm (7.87 inches)  - 9W: 225mm (8.86 inches)  - 11W: 245mm (9.64 inches)  - 13W: 245mm (9.64 inches) · Package Size: 28.8 x 8 x 4.5 cm (11.34 x 3.15 x 1.77 inches) · Package Weight: Varies by wattage (245g to 271g) Usage Recommendations: Place the sterilizer inside the filter tank—not directly in the fish tank—for optimal sterilization. Operate 3-4 times per week for 10 minutes to 1 hour each session. For tanks with excessive algae or sick fish, use 1-2 hours daily but do not exceed 2 hours. Resume normal use once conditions improve. Always disconnect power before handling. Package Includes: · 1 x UV Light Sterilizer This UV Light Sterilizer combines energy efficiency, safety, and powerful sterilization performance to enhance water clarity and promote a healthy aquatic environment for your aquarium or fish tank.