I just started a new bs culture a couple days ago. Yesterday, I notices an adult shrimp in my culture. It appeared to be dead, but I was wondering how long it takes for bbs to mature. I was under the apression that it took about a week. Could it have been a mutation, or somthing left over from the tank (a 4.5 gal I bought at an auction)? Any help would be appreaciated. Thanks, J