Like the title says, I pitched an old pack of roeslare (it was from May, but all the LHBS had) about a week ago. Is there any way to tell if this is working? There is no pellicle, and the airlock is dead still. Is there some other kinds of signs to look for? How fast does it eat the sugars? If I took a hydro reading today then in 2 days from now, would I be able to see a change? Thanks guys!