hi been running my tank for 7 wks withliverock,inverts and 4 fish everything is doing well. used my hydrometer all this time with a salinty reading at the 1.023 mark. Well today i wanted to insure my investment for my fish one being a purple tang$$$ and bought a refractometer which gave me a different reading of 1.028 which is out of the window so to speak. that is quite a variance. What are the repercussions of the salinty being this high even though the fish are thriving, and how do i correct the salinty level in the proper way? Thanks