So I started brewing a Hefe the other day. Everything was normal with the brewing, it had a nice brownish color when it went into the secondary (see my banana recipe) but I've noticed that it's gotten very dark since the first day I've put it in there. It seems to me to be almost black at this point. Any one have any idea what might be going on here? I've made this recipe about a dozen times and it's never done this before.