K Man Posted February 11, 2023 Share Posted February 11, 2023 Hi Everyone, I'm brewing a NEIPA for the first time with Safale S-04. The OG was 1.056 and after 4 days I dry hopped and the SG settled at 1.019 for the next 2 days. I brewed at around 19-20C I assumed with the SG level at 1.019 for 2 days, fermentation was done so decided to perform a diacetyl rest before cold crashing and bottling. I raised the temperature slowly to 21.5C but then for the next 2 days, the fermentation kicked in again and the SG dropped to 1.016. Should I continue to raise the temperature to verify that fermentation has truly finished or just hold at this temperature to see if SG continues to fall (s-04 fermentation range is between 15-20C according to the manufacturer)? Would holding at 21.5C equate to a diacetyl rest for Safale s-04? Thanks for any advise. 1 Link to comment Share on other sites More sharing options...
ozdevil Posted February 12, 2023 Share Posted February 12, 2023 i wouldn't raise it anymore, if you feel it needs to drop more just leave it and check back in 2 days before crashing again if the numbers haven't changed pretty safe to crash 2 Link to comment Share on other sites More sharing options...
Aussiekraut Posted February 12, 2023 Share Posted February 12, 2023 1 hour ago, K Man said: Hi Everyone, I'm brewing a NEIPA for the first time with Safale S-04. The OG was 1.056 and after 4 days I dry hopped and the SG settled at 1.019 for the next 2 days. I brewed at around 19-20C I assumed with the SG level at 1.019 for 2 days, fermentation was done so decided to perform a diacetyl rest before cold crashing and bottling. I raised the temperature slowly to 21.5C but then for the next 2 days, the fermentation kicked in again and the SG dropped to 1.016. Should I continue to raise the temperature to verify that fermentation has truly finished or just hold at this temperature to see if SG continues to fall (s-04 fermentation range is between 15-20C according to the manufacturer)? Would holding at 21.5C equate to a diacetyl rest for Safale s-04? Thanks for any advise. +1 to what @ozdevilsaid. Don't rise the temp any further. You shouldn't need a d-rest for an ale yeast. The problem with S04 is that it is prone to stall. 2 Link to comment Share on other sites More sharing options...
ben 10 Posted February 12, 2023 Share Posted February 12, 2023 9 hours ago, K Man said: decided to perform a diacetyl rest Cannot find the spec sheet but pretty sure S-04 won't produce diacetyl 2 Link to comment Share on other sites More sharing options...
Shamus O'Sean Posted February 12, 2023 Share Posted February 12, 2023 2 hours ago, beach_life said: Cannot find the spec sheet but pretty sure S-04 won't produce diacetyl Agreed. But @K Man, I have found S-04 prone to stall around 18°C. Where you are at, at 21.5°C, is fine. Keep testing until stable. Then you will be good for cold crashing. 1 Link to comment Share on other sites More sharing options...
Classic Brewing Co Posted February 12, 2023 Share Posted February 12, 2023 9 hours ago, Shamus O'Sean said: Agreed. But @K Man, I have found S-04 prone to stall around 18°C. Where you are at, at 21.5°C, is fine. Keep testing until stable. Then you will be good for cold crashing. I am about to use S-04 in a Stout for the second time & both brewed at ambient temperature, I was warned about that yeast stalling but mine would have been around 22c or slightly higher without issue so that's handy to know. 2 Link to comment Share on other sites More sharing options...
K Man Posted February 12, 2023 Author Share Posted February 12, 2023 Thanks for the advise everyone. Very helpful and reassuring. 1 Link to comment Share on other sites More sharing options...
RDT2 Posted February 14, 2023 Share Posted February 14, 2023 I’ve used S04 quite a bit in my porters and stouts, I ferment at 21 with that yeast and never had a problem. In fact I used it in a Russian imperial stout on a yeast cake and it demolished it! 1 Link to comment Share on other sites More sharing options...
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