Is that advice also valid for ocean diving (as opposed to freshwater)? I'm not sure whether buildup of salty crust from years of use will be detrimental to the function of the regs, in the long run.you've been duped. There are no "consequences" to be paid by going too late. Regulators work until they don't. Buy an IP gauge and check your regs once a month or so. If the IP isn't creeping and the second stages aren't leaking, there is no reason to service. Using them that often will be better for them anyway. Go on the age recommendation not the number of dives recommendation if you're going to follow a schedule, but they likely won't even need that