Not able to completely close off DIY co2
I’m using a DIY co2 system and tried to close the tap at night. However, even if I tighten it as much as possible (even used pliers) there’s still somehow a bubble every 13 seconds. Is this lethal? If so what can I do to try seal it off?
I know one method is to leave an air pump running at night but I don’t seem to have enough space to plug one in. Could the flow of a HOB filter help?