Is it normal for an American Lager Wyeast that is over 1 year old to have a mostly yellow color with a brown streak thru it and what looks like a green stop. This is what I see on top of the lager. It was about 52 degrees now it has settled around 48 degrees. I hope I'm no f'ing it up by opening the fridge. Everytime I do it rocks the carboy because there isn't quite enough room in there. I've only opened it 3 times and will stop because I know I'm suppose to leave it alone. I hope I'm worried over nothing but I really don't want to ruin my first lager with the funk!