I do 3 gallon batches using BIAB. This is my third or fourth time using this setup, and this batch is a Kolsch with an OG of 1.055. Everything went fine up front with the mash and boil. I'm using Wyeast 2565 for this batch, and I activated the smack pack and had it swell over the course of the brew day. I pitched the yeast last night, and everything seemed fine, but this morning there is no sign of fermentation - no bubbling, no beginning of a krausen, etc.
So I went back after the fact and looked at the Wyeast package, and it apparently was manufactured back in Sept, so using one of the online calculators, is only 25% viable.
Previously, with fresher yeast, I've been ok going right from a smack pack into my 3 gallon batches of IPAs (using 1056). But with this yeast, I probably needed a starter and it's underpitched.
So my question is - can I go back and add more yeast to it now (24-48 hours later), or is this batch likely doomed, and I should just toss it. If I'm at high risk for serious infection/oxidation/off flavors by repitching, then I'd rather save the money I'd be spending on another yeast pack.
So I went back after the fact and looked at the Wyeast package, and it apparently was manufactured back in Sept, so using one of the online calculators, is only 25% viable.
Previously, with fresher yeast, I've been ok going right from a smack pack into my 3 gallon batches of IPAs (using 1056). But with this yeast, I probably needed a starter and it's underpitched.
So my question is - can I go back and add more yeast to it now (24-48 hours later), or is this batch likely doomed, and I should just toss it. If I'm at high risk for serious infection/oxidation/off flavors by repitching, then I'd rather save the money I'd be spending on another yeast pack.