![](https://www.co2-4u.eu/90-large_default/navulling-05-kg-gas-co-aquarium.jpg)
CO² gas bottle, filled with 0.5kg CO², especially for aquarium (made for long lasting and professional use).
ATTENTION:
ONLY PEOPLE WHO ALREADY HAVE SENT THEIR EMPTY CO2-4U CYLINDER BACK TO US
(at your own expense)
, CAN ORDER A REFILL CYLINDER. IF NOT YOU HAVE TO ORDER A COMPLETE ONE.