I brewed my first beer last night, a small batch of Brooklyn Brew Shop's Everyday IPA. After pouring the cooled wort through a strainer and into the carboy, I attached a blowoff tube. This morning I noticed a fair amount of green-ish sediment/foam clinging to the walls of the blowoff tube, which I suspect to be some sort of hop/grain flotsam. There also appears to be a significant build up about an inch or so from the top of the carboy, though off gases seem to be escaping without any difficulty. Some of the detritus also made its way into the small bowl of sanitizer at the other end of the blowoff tube. As this is my first homebrewing experience, I'm just wondering if this is normal. Finally, I was thinking about dry hopping with a little amarillo in about three weeks, a few days before bottling. Anything to be concerned about?