Originally Posted by novalou
You can use the whole packet. I've actually used a packet split between three different batches. If you wish to do that, the rest can be stored in the fridge.
Yes, but since it will lose so much viability after its opened that you might as well use it all unless you'll be using the rest in a week or so.
The "dosage" for one package of yeast is "one to 6 gallons", so you can certainly use the whole package.