So I am brewing a clone of greenflash west coast ipa. It has an estimated OG of 1.072 and is a batch size of 6 gallons. After plugging the numbers into beer smith, it said i needed a cell count of 290 billion which comes out to be a 1.8 L starter. Does this sound right? It seemed a bit too much to me. What do you guys think? Will one vial do, or do i need two vials for this starter?