It's a 5 gallon kit. I guess I could calculate out the recipe and toss the leftover DME and LME, but I might as well just do the full recipe and let the blow off loss go. That would be less than losing a gallon, right?

I just brewed my first extract kit this past weekend. I have one 6.5 gal glass carboy and four 5 gal carboys. While my 6.5 is in use for two weeks, I thought about brewing another extract kit. Should I split it into two 2.5 batches and use two 5 gal carboys or keep them in one? I anticipate a...