Co2

[Shaun]

Does the CO2 for CaRx have to be beverage grade or will fire grade be ok ?

[Alan]

Both are fine, plenty folk use fire grade.

[Shaun]

Thanks

Just wondering about the diff grades, would it not be better if we use the purer CO2.
One can use tape water for water change, but it is better to use RO.

Does any body know the diff between the two grades? ie what is in the fire co2 that is not in the good stuff.