I am new to brewing and have brewed the 2nd batch (german hefe). I saw a lot of activity the first day in the air lock and none after that. I brewed the beer last Saturday and its been a week since then. When I brewed my first batch it was different were in I saw the bubbles after 2 days and i could say activity for around a week. Is this normal to see no activity after 1st day? what should I do ?