High gh low ph help!

[moog24]

I have tested my water from my ro/di and it reads 60 gh. Once I add salt the gh is off the charts. Bad salt?

 

[Rmckoy]

Once you add the salt GH is for freshwater.
KH is what you should test ,
Kh is alkalinity ,
Which works together with your ph and cal level

 

[moog24]

Thanks for the help