kg CO₂ Cylinder – Pre-Filled (Aquarium Safe)
This 5kg CO₂ Cylinder comes pre-filled and ready to connect, making it an easy and reliable CO₂ source for planted aquariums. The larger capacity provides longer runtime and fewer refills, making it ideal for hobbyists running high-tech planted tanks or larger aquariums.
Built with a durable powder-coated steel body and brass valve, the cylinder is designed for safe, long-term use. It features the standard W21.8 NZ/AU valve thread, making it compatible with most aquarium CO₂ regulators used across New Zealand and Australia.
The cylinder is also AS/NZS 1841.6 certified, meaning it meets safety standards and can be refilled by approved gas suppliers once empty.
Features
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Pre-filled with 5kg of CO₂ – ready to connect to your regulator
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Aquarium safe – ideal for planted tanks and aquatic livestock
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Standard W21.8 valve – compatible with most NZ/AU CO₂ regulators
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AS/NZS 1841.6 certified – approved for safe use and refilling
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Longer runtime compared to smaller cylinders
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Durable powder-coated steel body with brass valve
Specifications
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Capacity: 5kg CO₂ (pre-filled)
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Height: 67cm (with valve)
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Diameter: 15cm
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Valve: W21.8 (NZ/AU standard)
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Certification: AS/NZS 1841.6
