Acid blend will only work to a small extent as its only the citric acid that does the job and blend contains malic, tartaric, and citric. You use the same amount as the sulfite you used or less depending on how strong you want the batch. I only add the citric to the amount Im using at the time cause it will strengthen it at the time but will make it weaker in the long run as it will cause the S02 to disperse.