I was given two older hydrometers this week by a coworker who has been out of the hobby for some time... first, note how the recommended salinity range has grown over time! Second, the hydrometers measured inconsistent, the two old ones measured 1.019 and 1.022, while mine measured 1.025 (on some fresh saltwater I was mixing). I have always kept my salinity close to 1.026 because corals just seemed happiest at the higher salinity but I also suspected my hydrometer measured high. What do I do now that I don't trust the hydrometers anymore - just stick with one, stay consistently at a salinity where corals seem happy knowing I have no idea what the actual level is... or spring for a refractometer or salinity monitor? And which do you recommend?