First time Ive used this yeast, and airlock activity has slowed drastically after 36 hrs. One packet in a 2 L starter on the stirplate 24 hours. Chilled it 2 days, decanted and pitched at 62 degrees. Took off in 2 hours, maybe less. High kraeusen at 24 hours, constant airlock movement. Checked in on it this morning and the kraeusen dropped to half, airlock is bubbling every 15 seconds or so. Fermenting at 67.
Is it normal for this yeast strain to slow down that quickly?