Premium 1L aluminum CO2 aquarium tank with precision W21.8 on/off valve for professional aquascaping. High-grade lightweight aluminum construction ensures durability and corrosion resistance for long-term underwater use. Seamless internal polishing prevents gas leakage while precision CNC machining guarantees smooth valve operation. Perfect for planted tanks requiring stable CO2 injection in home aquariums or commercial aquatic displays. Industrial-grade threaded connections ensure secure tubing attachments for worry-free installation. Compact cylindrical design maximizes space efficiency in cabinet setups while maintaining optimal gas capacity. Ideal for serious hobbyists seeking reliable pressurized CO2 solutions with professional-grade components.