My brother ran a hydrogen rig on his truck about 6 months he got rid of it. You have to use stainless steel hardware, distilled water, baking soda. To much baking soda the mix is to hot not enough baking soda not hot enough. The tech is just not worth the hassle. IMO.

Blessed be the Lord my strength, which teacheth my hands to war, and my fingers to fight. - Psalm, CXLIV