Carbo Night M400

The Dennerle Carbo Night M400 carbon dioxide fertilization system is a professional, complete solution for nourishing aquatic plants in aquariums up to 400 liters. The system operates by injecting gaseous CO2 from a 500g refillable steel cylinder, regulated by the high-precision Evolution Quantum pressure reducer. The key feature is the integrated magnetic solenoid valve for night-time shut-off: connected to a standard aquarium timer, it halts gas injection at night when plants stop photosynthesizing and instead release CO2. This prevents dangerous gas accumulation, stabilizes pH, protects fish from hypoxia, and doubles the cylinder's operational lifespan. Diffusion is managed by the included Flipper, which breaks down bubbles as they climb a cascade to maximize contact time and dissolution in the water.

Key Features

• Integrated Night Solenoid Valve: Halts CO2 injection during dark hours via an external timer, preventing fish suffocation and saving gas.
• 500g Refillable Cylinder: High-grade steel cylinder with standard safety valve, allowing for easy refills at local shops.
• Evolution Quantum Regulator: Professional pressure regulator with automatic working pressure stabilization and needle valve.
• High-Efficiency Flipper Diffuser: Maximizes CO2 dissolution as bubbles slowly climb the cascade, extending contact time with water.