If you are going to rim the glass, pour the smoked salt on a plate and take a wedge of lime and run it around the rim of the glass. Dip the rim of the glass into the salt on the plate.
2-3 tablespoons smoked sea salt
In a cocktail shaker, add the tequila, the grapefruit juice, the simple syrup and the lime juice. Shake for 15-30 seconds to mix and chill ingredients.Strain into the previously rimmed glass and top off with sparkling water.