So i have been kegging using a 5 lb co2 tank. The first time was a mess but ended well. Now in have a system down or I thought. I put 5 gallons choc stout in a ball lock keg with a full co2 tank. Charged in with 30psi and rolled the tank around. First question do you guys keep under pressure or remove gas line while it sits? I ask because I feel when I check 24 hours later I used almost half the co2 tank, is that normal on a 5 lb tank? Thanks for the advice