Does the tightness of a lid matter if you're using foil to cover the holes? I can understand why a loose lid would be needed if using tape over the lid holes, but is the same necessary if using foil with no tape? I would figure the gas exchange would be through the holes in the lid and not through the lid itself. Or do you do both foil and loose lids just to be on the safe fide of gas exchange? Thanks for answering my rambling question.
There is no need for a loose lid when you have holes with foil over it.