I racked, stabilized & de gassed 3 five gal carboys yesterday. All 3 were started 6-7 weeks ago, open ferment for 5-7 days, then secondary for the balence. All started at 1.85 to 1.92. When I tested them yesterday ALL were .895 to .897. Is this possible, never seen a SG below .990 before. May need to get another hydrometer to check this one against, but it seems to be working fine on the top end. One Cab, one blackberry, one elderberry, all from concentrates. Roy