I just set up my new tank. Been runing for a week with nothing in it but live rock and live sand. NO corals or fish in it. I have been testing it every other day. Levels are good. Ph is slightly low but im adding marine buffer to raise it. Ammonia is 0 and everything is good. Tested the salinity today and its at 1.015. I bought the pre made saltwater from my lfs. How do i raise it to make it safe for corals and fish ? I will be running the tank for one more week before i add hermit crabs and snails to it. And 2 more weeks before i add my fish and corals from my established tank.