All ISTA Aluminium Cylinders are refillable at your local aquarium shop or fire extinguisher refilling centers.
CHARACTERISTICS
Seamless aluminum CO2 cylinder, TUV/DOT approved, safety and quality assured.
Precise pressure reduced regulator provides accurate and reliable CO2 output.
Ceramic CO2 diffuser ensures the best dissolving rate, placing it at the bottom of tank can increase CO2 diffusing time in the water. Convenient to change the ceramic disc.
awsome
extremely satisfied with purchase. quality materials used.