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https://www.swelluk.com:443/jbl-gas-bottles-500g-and-2kg/ 
JBL Gas Bottles 500g & 2kg
Ensure your planted aquarium has the CO2 it needs to thrive with these JBL Gas Bottles 500g & 2kg. Safe and easy to use, they are refillable too, and at their best prices here at Swell UK.
Products
Product Information
Designed to fit the JBL CO2 Systems, these refillable bottles are ideal for the planted aquariums.
500g Gas Bottle
- Ready filled
- Refillable
- External international valve
- Safety valve protection (cage)
- No stand included
2kg Gas Bottle
- Ready filled
- Refillable
- External international valve
- Safety valve protection (cage)
- Free standing - no stand required