How much BAC water should you use? It depends There is no one size fits all answer. Different vials may need different amounts of BAC water depending on how strong you want the final mix BAC Water for Peptides 4 Pack 10 mL Each 0.9% Honduras Ubuy BAC Water 30ml Large Bottle We Reconstitute Your 3ml Peptide Vial with B12 (5,000mcg ml) & BAC [Order 1 for each Vial you want us to fill] BAC WATER Bacteriostatic Water 30ML Simple Peptide