Originally Posted by CaptainAhab
If you really want to be a stickler you would get calibration liquid and calibrate to the SG
This is the calibration fluid:
Aquarium Testing Solution: American Marine Inc. 53.0 mS Calibration/Reference Fluid
In my opinion, it's more than being a stickler... it's just more accurate. My refractometer doesn't read accurate at both 1.000 (RO
) and 1.026 (35ppt). When I calibrate it using the calibration fluid, it will read about 1.002 when it's seeing 1.000 RO
water. Better to calibrate it to a standard that is closest to the tank's salinity.