At what point do you start to get concerned about fermentation beginning? I took part in a fund raiser that provided 5 gallons of wort from a local micro brewery for your contribution. All you have to do is add yeast or whatever else you want to put in. It is a brown ale, OG 1.0568. The beer came out of the tank at 65 degrees and I pitched one packet of Safale 05 as soon as I got home after a very short ride. 24 hours later, there appears to be no activity. I've never had this happen before. Is the best course of action adding another packet of yeast? If so, at what point? I know this is probably a rookie question, but any input would be appreciated.