Our Refillable CO2 Cylinders

are the heart of any high-tech planted aquarium setup. These tanks are constructed from durable, high-pressure steel and feature a reliable Brass Wheel Valve, allowing for easy and precise manual opening/closing of the gas flow before or after

connecting your regulator. Available in 2kg, 3kg, and 5kg capacities, they provide the sustained, regulated CO2 supply essential for vigorous plant growth. All cylinders are rated for high pressure and are compatible with standard aquarium CO2 regulators. Choose the capacity that best suits your tank size and desired refill frequency.