Ok the frist batch is on day 17 (total from first fermenter to primary). The airlock shows minimal signs of activity by bubbling every ten minutes or so. At what point would one take a hydrometer test to see if it is actually done fermenting? I don't want to open the frementer up any more than I have too! My guess would be when there is no activity at all in the airlock but how long would one actually sit there and wait to see if it bubbles again? Lol!