I did my first BIAB last Sunday . 3 gallon Irish red kit. Everything went well, very easy process, hit my OG (1.048) and mash PH target.
what has me worried is the Danstar Nottingham Ale yeast (dry) I used. I did hydrate before using but maybe my water was cooler than recommended for that process (about 68 deg). I pitched it into the wort with wort temp right about the same (68 maybe 67 F). I got activity in the airlock about 12 hours in, a little krausen but not very much at all. After researching I slowly dropped the temp down a bit (64 deg). Still a little activity in the airlock but nothing what I would expect. But then again I have never used this yeast. At 6pm today it will be 72 hours from original pitch. It is a smaller batch (maybe 3.5 gallon in the primary) but I cant believe I missed the main activity already.
Is it safe to wait a couple more days and them measure the gravity and if not much progress pitch another packet? Or maybe this yeast just acts a little different and is doing the work slowly ?. I had just received the kit from NB along with the yeast the day before brewing, but I did not check the date on the packet. figured pitching the whole packet into a smaller batch would be ok and help insure against a low cell count at the start if it were a bit old.
Thanks for any insight.