Water Chemistry in bigger batches

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Other thing I noticed is brewfather said 4 packs of yeast in big batch but I only used 2. sure 2 packs of yeast is enough for 46l have I been under pitching and the big batch is stressed??

That's an interesting point. I often use 2 packs in 23ltrs. I think I would have put at least 3 in 46. There might be something about greater volume needing more than a proportional increase.
 
That's an interesting point. I often use 2 packs in 23ltrs. I think I would have put at least 3 in 46. There might be something about greater volume needing more than a proportional increase.
Been sat wondering why things have changed for a few week now. Put a thread on here and within 2 days I've found a few things where I've gone wrong so I'm glad I put a thread on. Thanks everyone who's took the time to reply.
 
I suspect the 30L system has a closer, lower ratio of sparge volume (untreated alkalinity) to liqour held by grain absorption (buffering capacity). The 65L system having a higher ratio that is extracting more tannins and adding more unbuffered liqour to the boil, raising pH.

@Sadfield

How that's a properly relevant change. Nicely thought through. đź‘Ť
 
Been sat wondering why things have changed for a few week now. Put a thread on here and within 2 days I've found a few things where I've gone wrong so I'm glad I put a thread on. Thanks everyone who's took the time to reply.
Two packs of yeast should be fine. If this was an issue, it would most likely present as slow, not stressed. Temp & YAN/FAN do that.

Do you get any smells during fermentation?
 

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