Re-Attach Deck to Stringers

[thedink9]

The bond between my deck and stringers has loosened in a few spots and the deck has saggd, as well. It looks like the bedding material is pinkish in color and rock solid.
I want to get the deck back to its original height.
Any suggestions of what to use to re-bed? A friend suggested some epoxy covered wood but I can't accept this after taking loads of wood out, that were jammed under there by the previous owner, as a quick fix. Dink