Well I wanted to send out a warning that not all Salinity calibration fluids are not created equal.
I got a hanna salinity checker a couple years ago and wanted to try it out so I calibrated it and checked my tanks salinity that I keep at 1.026 or 35 ppt. I was suprised that the hand held read 33 ppt. I ran the calibration again and found the same 33 ppt.
So I checked my refractometer calibration and it was reading 35 ppt and checking the tank water also read 35ppt.
This is no good because now depending on who is right I am either low or good so I went to
Amazon for the tie breaker and ordered brightwells salinity calibration fluid and after calibration read my tank at 1.028!
I then ordered a different brand calibration fluid AND a Tropic Marine Hydrometer.
After getting all these in the new fluid agreed with the
BRS fluid and the Hydrometer also read 1.026.
I took a sample into my local lfs and they also got 35ppt.
I’ll give Hanna a break since the calibration fluid was at least 2 years old but not sure what happened with the
Brightwell Aquatics fluid.
