I think I might have not collected all that I could but I did end up with some... is that brown, beerish, stuff unusable and should be discarded? Or should I just save the whole jar? There is a decent layer between the trub and the brown, that's the good stuff right? Also, brewing another batch Sunday and was going to do a starter tomorrow, should I put all that jar into the starter? Or extract that middle layer mostly by pouring off the top?