Its going on 2 days on my starter and krausen is falling back in. I would like to know what should be the FG for it? Never made a srarter so im new to this. The OG was 1.035-1.040 ish. Just trying yo get an idea how long it'll be. I want to cold crash it when ready. Thanks
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If you allow the starter to finish the yeast will build up glycogen reserves which will help them ferment the beer. If you crash it now you will have 90% of your cell count. It all depends on how much time you have. You could let it wait for a week with no I'll effect. Assuming 100 billion cells in a 1 or 2 litter starter 3 or 4 days is pretty much ideal.
Like with beer a stable final gravity would indicate that 100% of the cell count / fermentation has been achieved.