I have a regular plastic bottling bucket with a tap near the bottom and a snap on lid that has a built in rubber gasket. Im assuming this makes it air tight. For my primary I know i need to ferment in here, but im not sure how to allow the pressure to escape using this setup. I have seen lids with a spot to attach one of the bubble air locks in pics on here. Are these readily available or am i going to have to rig something up? Also, I assume i need an airlock to seal the [word i cannot remember, the mead equivalent of wort], is this correct?