Setting up auto water changer and mixed the bin. I wanted my salinity to be accurate so measured with
Hanna at 32.8ppm[aiming 35ppm]
BRS refractometer at 35
TM Hydrometer at 1.0275[35ppt equivalent is at 1.026?]
All measured at same temperature around 68°F and same time. Which one to trust? I calibrated hanna and refractometer right before testing. Refractometer says ATC on it so I am assuming it is temperature corrected? What am I doing wrong here?
I also saw one post from 2018 by Randy, it was actually a question to what salinity will a 35PPT at 20C change when checked at 30C. If this is the case, what salinity are we supposed to mix the bin to, if it's going to change when it reaches tank temp?
Hanna at 32.8ppm[aiming 35ppm]
BRS refractometer at 35
TM Hydrometer at 1.0275[35ppt equivalent is at 1.026?]
All measured at same temperature around 68°F and same time. Which one to trust? I calibrated hanna and refractometer right before testing. Refractometer says ATC on it so I am assuming it is temperature corrected? What am I doing wrong here?
I also saw one post from 2018 by Randy, it was actually a question to what salinity will a 35PPT at 20C change when checked at 30C. If this is the case, what salinity are we supposed to mix the bin to, if it's going to change when it reaches tank temp?