水草情迷

Hi all,
When will you take the CO2 bottle to recharge? When all used up? 10 bar or 20 bar?

When using 1 bubble per sec., how long can we use for 500g Co2 bottle?
I just bought a 500g Co2 and use it for one and half weeks, now it already down to 30 bar. is it normal?

Thanks and regards

I recharge my co2 tank when it is zero bar. my 1.5 kg co2 tank can use 3 month.

I charge when the pressure drops below 30 to prevent dumping.