Wife bought me a 2 stage kit and all of the perrifs, but there were no instructions so I began reading and consulting with another brew friend out of state. I have a brown ale cooking for 3 days primary, and realized that I did not fill the air lock with fluid. I put some in today, but wonder if this is too late now? I am guessing that there is more venting out than could get in, but words from the wise are welcome!! . . . ??