"What they do when they hydro a tank is remove the reg," im sorry but a proffesional who deals with scuba tank retesting, and other hpa tanks, told me that the reg does not need to be removed, i was told myself by Fatbobs to remove the reg, anyway, the person told me, that i shouldnt have removed my reg, and what fat bobs has told me, is a load of rubish? as they dont no what they are talking about?