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45G CO2 cartridges are used to provide carbon dioxide (CO2) to aquarium plants. The CO2 gas dissolves in the water and provides a source of carbon for the plants, which helps them to grow. 45g Cartridges typically last for around two weeks.

Our 45g Co2 cartridges use a 5/8 Thread the same as Fluval CO2 Refill Cartridges. They can be used with Fluval Pressurised CO2 Kit. (We also have 95g Co2 Cartridges in stock)

All prices include VAT + Free next day delivery (Including Saturday delivery). Same day dispatch when you order before 15:00 Monday to Friday.