The yeast will mulitply to MANY times the amount that is in those two packets. It just means they won't spend as much time mulitplying & they'll start fermenting... which is a good thing.Ale Belly wrote:Can someone tell me if there will be a problem if both packs of yeast are active? .. Can there be too much yeast?
It's great if you can plan a second brew (which is often bigger) & throw it directly on that yeast cake (when you transfer that one to a secondary fermentor after a week or so). This saves on the cost of yeast & the fermenation starts really quick.
When yeast are multiplying, they supposedly do produce more esters though... so if you desired more esters, you may not want to use a huge cake (like for a hefeweizen).