Hello, 1. Yes, the optimal pH will be around 4.0-4.50. Try to adjust the proportion like this. (In case the formula is actually used to produce must be adjusted to be in the range of every lot because each lot of raw materials produced has a pH range, not a fixed value) 2. It is not recommended to add alkali, use
Gluconolactone in proper proportion. fit the desired value No need to add more alkaline.