CO₂ Valved Cylinder for Aquariums – 2kg & 5kg Refillable
Build a reliable CO₂ system for your planted aquarium with our refillable CO₂ valved cylinders, available in 2kg and 5kg sizes.
A quality CO₂ cylinder is the foundation of any pressurised aquarium CO₂ setup, providing a dependable and reusable source of carbon dioxide for planted tanks. Once empty, these cylinders can be refilled and reused, making them a practical long-term option for aquarists running pressurised CO₂ systems.
When paired with a suitable regulator, diffuser and associated CO₂ equipment, a pressurised CO₂ system can help support stronger plant growth, improved colour and healthier planted aquariums.
Available Sizes
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2kg Refillable CO₂ Cylinder – ideal for smaller planted aquariums or where space is limited.
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5kg Refillable CO₂ Cylinder – a great option for larger planted tanks or aquarists wanting longer periods between refills.
Refillable & Reusable
Unlike disposable CO₂ solutions, these cylinders are designed to be refilled once empty, providing a more economical and convenient option for long-term planted aquarium use.
Collection Only – Dangerous Goods
CO₂ cylinders are classified as dangerous goods and cannot be shipped by courier. This product is available for collection only from Simply Fish.
New to Aquarium CO₂?
If you're looking to get into CO₂ injection or aquarium dosing, come in and speak with the Simply Fish team. We can help you understand the equipment required and build a CO₂ or planted aquarium setup suited to your tank, plants and goals.
Whether you're setting up your first planted aquarium or upgrading an existing CO₂ system, we can help you choose the right cylinder, regulator, diffuser and accessories.
Available from Simply Fish in Christchurch, New Zealand.
