I added a 25 oz(750ml.)of almond flavored syrup to 5 gal.of plum in the primary before I realized it contained sorbate.Can someone right this wrong?SG is 1.080 and temp.@ 78F.I'm do not know how much sorbate was in the bottle.I pitched a yeast starter(Lalvin 71B-1122) twice, with very little activity.