CO2 Cylinder 1kg

The 1kg CO2 cylinder is the go-to choice for large planted aquariums, high-tech aquascape setups, or hobbyists running CO2 injection across multiple tanks from a single source. The refillable aluminium body offers a good balance of weight and durability, and the CGA320-compatible valve works with the vast majority of aquarium and professional CO2 regulators. At typical planted tank dosing rates, a full 1kg cylinder provides many months of continuous injection in a standard 200–300 litre aquarium, significantly reducing the inconvenience of frequent refills. The larger gas volume also reduces the risk of the pressure fluctuations associated with smaller cylinders nearing empty. Refilling is available at welding gas suppliers, home brew shops, and specialist aquatic retailers.