I guess we got our measurements confused, I thought you meant the salinity was 30, salinity and specific gravity are two different scales for measuring the salt in the water. Your reading in specific gravity, in that case you definitely want to bring it down to 1.026. You can drop it down over the course of a week or so using plain RO
If your using some sort of electronic meter, hopefully someone else can chime in to help you with that. I use just a handheld refractometer.