What should I be doing?

[sailfin tang]

The Aquarium has been up and running for about 6-8 months.
The parameters are...
PH 8.2
Nitrate 0
Alk 3
DKH 8.4
Phosphates 0
SG 1.024
Temp 80
Calcium over 600
I have been adding salt each day to try and raise to 1.026.
Could this be why my calcium is so high?
I add nothing else to the tank.

 

[mckaax]

Are you just adding salt or are you adding salt water? I am pretty sure it is a very bad idea to just add salt. The salt needs to be mixed with water before you drop in into your tank.

 

[sailfin tang]

I am adding just salt straight to the sump.
Could that cause the calcium increase?