My ghl probe is reading 29.8 PSU and my Hanna Salinity checker reading at

42.7 PSU; I calibrated both today

I also checked with my VEEGEE STX 3 and reading at 43. I am guessing need new conductivity probe or I am doing something wrong.

I put the solution in my tank for 3 hours; I left out probe for 1 hour to dry, I then started to calibrate. I took the temp of calibration solution with external temp and it came up 25.4C I put that in the profilux. I did calib tolerance 1 and even tried 2 and still way off from both my refractometers.