S-04 and 2.5 Gallon batch

I plan on using S-04 for my "Nutella" Sweet Stout this weekend. I only make 2.5 gallon batches which would, according to the pitch rate calculator, need to pitch only 6 grams of yeast. What is the best way to go about this? Pitch correctly and save the other half or just over pitch? If I pitch the correct amount, how long will the other half last last? I don't plan on brewing for a couple weeks after this.

Thanks

Well if the yeast is dry, it will last almost indefinitely (several years), just put it in a plastic ziplock bag and place it in your refrigerator to be safe. Do you make a slurry before pitching to avoid shocking your dried yeast? As for the pitch, from what I have read, there is no drawback to over pitching, besides maybe rapid fermentation, but there is a drawback to under pitching your yeast, in that it may not ferment correctly.

P.S. nice brewery name

I've made several 2.3 gallon batches with S-04 and pitched the entire package. I had pretty active fermentation but no issues with flavor or anything else that I could determine. The whole package worked out well for me.

Ron

Just throw in the whole pack. FWIW... If you try to save some you are opening yourself to contamination issues.

Actually this will be my first time using dry yeast. I have used White Labs and Wyeast up to this point but I wanted to give dry yeast a try. I figure that I am going to make a slurry for it.

The issue with contamination was the one of the issues that I had thought about, that and longevity.