Hanna Calcium Result - X = likely Calcium level

[dyno]

Who has an equation ready to get an more accurate calcium level from the Hanna Checker? What are you guys subtracting?

Salifert result: 380
Hanna result: 468

 

[taricha]

Who has an equation ready to get an more accurate calcium level from the Hanna Checker? What are you guys subtracting?

Salifert result: 380
Hanna result: 468

@Rick Mathew did some calibration work on the Hanna Ca checker...

 

[Reeferbadness]

I stopped using the Hanna calcium checker a long time ago - was always inaccurate. I have a Trident now + use Salifert Calcium every other week to double check my Trident - both are always in agreement.