Hi First i need say thank you that shares your experience to me. Second I have 2 question 1- My first question is Calculate the amount of yeast for making wine. So I went to this website https://vinoenology.com/calculators/fermentation/ and so they write “yeast rate addition” in index of “fermentation/Yeast” in bottom page but I cant find this number in our yeast packet and in any website. is a "Yeast Rate Addition" a YAN(Yeast Rate Nitrogen)? you know I want to find and formulas for calculate the amount of yeast for making wines. 2- My second question is about PH. I read some paper that said: best PH is 3.1 and some body else said 4.5-5.4 is best for making wine. so what what is best PH for making wine? can you help me please? Thank You. Best regards, Sam.