To start, I don't use dry yeast typically but want to use it more. I know I read something similar to my question on here but I can't find it, I brew 15 gallon batches and for this one will probably start with 16-17 gallons in the fermenter. Its going to be a new zealand pilsner and using 34/70 target OG is 1.054 When I put this in brewers friend pitch rate calculater if I use a 5L starter of 1.040 wort with 2 packs of 34/70 I am still underpitching... If I use 3 packs which would supposedly get me close based on the packet saying 1 pack per 20-30 liters that is still underpitching. I can do a 2l starter then step it up to a 5l starter but is that necessary based on what the packets reccomend. Should I just buy 3 packs and be done?