I’ve had an ongoing problem with what I suppose is stuck fermentation that I’m hoping someone here could help me figure out. I’ve researched extensively to try to solve the problem, but I’ll skip all of that just to say that my process I’m about to describe is the product of that research and me trying to solve this issue.
I brew all grain with typically an hour boil on a grainfather setup. Achieved 1.059 OG (should’ve been 1.049 according to recipe). The last batch was a Kolsch but this has been happening with Pilsners and lagers. Use fermcap and whirfloc and transfer to a corny keg (with floating dip tube) using a wort aerator from the top of the keg to get plenty of O2. Pitch a yeast starter that has been on stir plate for 24 hours (imperial dieter this batch) and ferment in a temperature controlled chamber at 65 degrees using a sounding valve at about 12 psi. Reading the SG with a refractometer that I calibrated with distilled water.
Here’s the issue - everything seems to go fine but at about 10 days gravity stalls at 1.030. I’m supposed to be at 1.009 according to recipe. I let it go another week and I’m still at 1.030. I’ve tried shaking the keg and that doesn’t seem to do anything. In the past, I’ve just said “oh well” and put in the kegerator and it’s been great beer, but I’d really like to try to nail down where in my process I’m screwing up. Any suggestions or insights would be appreciated.
Cheers!
I brew all grain with typically an hour boil on a grainfather setup. Achieved 1.059 OG (should’ve been 1.049 according to recipe). The last batch was a Kolsch but this has been happening with Pilsners and lagers. Use fermcap and whirfloc and transfer to a corny keg (with floating dip tube) using a wort aerator from the top of the keg to get plenty of O2. Pitch a yeast starter that has been on stir plate for 24 hours (imperial dieter this batch) and ferment in a temperature controlled chamber at 65 degrees using a sounding valve at about 12 psi. Reading the SG with a refractometer that I calibrated with distilled water.
Here’s the issue - everything seems to go fine but at about 10 days gravity stalls at 1.030. I’m supposed to be at 1.009 according to recipe. I let it go another week and I’m still at 1.030. I’ve tried shaking the keg and that doesn’t seem to do anything. In the past, I’ve just said “oh well” and put in the kegerator and it’s been great beer, but I’d really like to try to nail down where in my process I’m screwing up. Any suggestions or insights would be appreciated.
Cheers!