Friday will be day 7 of fermentation of our first brew. We had a new 12*P pitch of BSI-7 (similar to WLP007/Wyeast 1098). Grist is 90% pale, 6% crystal, 3% wheat and 1% black. Single infusion rest @ 152*F for 60 minutes. (Although, mash in was too hot and temps exceeded 160 for up to 10 minutes, but we got settled at 152 by 15 minutes). 90 minute boil, Oxygenated at 2 liters per minute for 35 minutes. OG=12.8*P. Pitch at 68*F. Fermented at 68*F for 48 hours. Let rise to 70 and held for 72 hours. Reached 4.2*P on day 4 and now at 4.0*P. I was hoping to get below 3*P. I tried rousing the yeast with CO2 through the dump valve once at the end of day 5 and twice on day 6. I got yeast back up in suspension, but not getting any better attenuation. I am pretty sure that either the early high mash temp or not enough oxygen is responsible for the low attenuation.
I need to collect yeast to brew on Saturday or Sunday. Fermenter is now at 70*F. Do I need to lower the temp before trying to collect yeast for the next brew? I was planning to count and (hopefully) collect enough for this next brew, let the first batch sit on the remaining yeast for a few more days and try for a little more attenuation.
I need to collect yeast to brew on Saturday or Sunday. Fermenter is now at 70*F. Do I need to lower the temp before trying to collect yeast for the next brew? I was planning to count and (hopefully) collect enough for this next brew, let the first batch sit on the remaining yeast for a few more days and try for a little more attenuation.
Comment