[pogodzib]

I forgot to test the vinegar last night. It's always tough to tell when your using a hydrometer what the actual reading is. Thankfully, corals and fish can adjust to the salinity. I have 2 hydrometers. One is off by 0.001 and one is off by 0.005 so when it reads 1.025, the actual salinity is at 1.030. Before I got my refractometer, my tank was probably at 1.030 for over a year and everything did good, so your tank could very well be in the 1.028-1.030 range without seeing any/minimal side effects.