When HCl is used, it is adjusted to 1.2 times the strength of the sodium chlorite solution, and is used in a 1:1 ratio. With Miracle-Mineral-Supplement at 22.4% NaClO2, the proper HCl solution would be 26.88%. Since a 5% NaClO2 solution is much safer to handle, the HCl concentration to use with this would be 6%. Since HCl is standardized at about 32% and is a solution, the dilution is done by volume.