For weeks now my salinity level been low. so i add s/w. my refractor shows 1.022 and i clean my ref.. with f/w and set it with f/w and its level all time ?????????
Iv calibrated my refractometer with RO water and then with calibrating fluid the RO method was off by .03 so if you've calibrated with RO water it could be off my hydrometer is always of by .01 so I usually use my hydro for quick tests
