The latest CO2 System Bio from Tropica is now available and ready for delivery! CO2 is the most important nutrient for plants to thrive and the CO2 System Bio is our latest simple solution that adds extra CO2 to the plants in small and medium aquariums. More CO2 solutions are also available at Discus.ae including larger cylinders and alternative choices to fit every requirement. Can't find what you're looking for? We can help! Contact us by clicking here to offer our assistance.