I just brewed a hefe and wisely used a blowoff tube. I had activity 5hrs after pitching and the next morning krausen spewing from the blowoff tube. When I got home today the vessel I'm using for the blowoff tube looked like milk. I dumped the water and there was a 1/4 inch of what looked like a yeast cake on the bottom. I'm still getting active bubbling from the blowoff so I'm probably ok, but is this normal?