Just brewed what I hope is going to be a watermelon wheat (1.051 OG). 50/50 2-row & wheat, mashed 152, hopped with Willamette, and pitched 1.3L Starter of WLP001. Fermenting at 67 deg, plan on racking over 2 lbs. of watermelon. It's been about 48 hours, and I see some krausen, some co2 building, but that's about it. No bubbling in the blow-off tube. Usually with this yeast, I've got a full vigorious fermentation going on. Also noticed "clumps" of, what I think is yeast, up near the top of the carboy. Never brewed a wheat beer before, so just wondering about these "clumps". Is it the wheat maybe? or the yeast? Just wondering why no real active fermentation. Thanks.