CO2 Cylinder 500g

This 500g refillable aluminium CO2 cylinder is a reliable and cost-effective gas reservoir for pressurised aquarium CO2 systems. The lightweight aluminium construction keeps the cylinder manageable while providing a substantial CO2 reserve that typically lasts several months in a medium to large planted tank. The valve threading is compatible with both CGA320 and W21.8 regulators, making it suitable for use with the majority of aquarium CO2 regulators on the market. Refilling is straightforward at welding gas suppliers, aquatic specialists, or using a suitable refill adapter from larger CO2 sources. The 500g capacity makes this cylinder a popular choice for aquascapers running medium to large planted tanks who want to minimise the frequency of cylinder refills while keeping equipment costs manageable.