Calcium levels over 600.......what is best to do?

[Smudge]

I just went through the same thing with my Red Sea Test Kit. My readings were 380 and I was increasing my dosing. In the end I was well over 500 and my kit still read 380. I stopped dosing and it took over 2 weeks for the level to drop to 400. New Red Sea Test kit compares to my Salifert one now. Mine was not in the recall range as well.