I am getting ready to make a yeast starter with WLP530. I used yeast man.com to show me the manufacturing date was 4/16/20. In brewers friend, with this date, it was estimated to have 50% viability. However, the white labs website shows that pure pitch viability of yeast at ~2.5months after the manufacturing release date to be ~94%. So this is a big discrepancy. Wanting to make sure I pitch the right amount of yeast at a pitch rate of 0.75. Which estimate of yeast viability do peeps use with WLP pure pitch yeast packs? Thanks.