I have tried most options for messing salinity in my 32 gallon reef. I bought the calibration fluid and have been relying on a handheld Refractometer. According to it my water is 1.026. Great! I read a lot of reviews for cal fluid and they seem poor for the one I have which is brightwells. So, I bought a tropic Marin hydrometer. It reads at 1.029. Is it possible for these things to be off from the factory? I’m quite frustrated. I do feel that since I have elevated levels for calcium and mag it’s possible. What would you all believe?