Calcium reactor with alkalinity dosing

[ivanotas]

Apologies as I cant seems to find this in any thread.
I am running calcium reactor and i am able to balance my KH at 8.2dkh but my Calcium is above 490 to 500ppm.
my corals are not doing well and these seems to be STN. i believe it my calcium is too high?
In video and in forum, people always share they run Calcium reactor and no dosing system.
Hence is it true? i am unable to keep my calcium and dkh at a balance stage of 8.2dkh and 420ppm.
I am thinking of dropping my calcium reactor drip rate to lower the calcium and dkh thereafter dosing alkalinity to have the dkh increase.
is this common? dosing with calcium reactor?

 

[Randy Holmes-Farley]

Calcium at 500 pm does not cause coral STN, nor any other significant issue.

What is the media in your reactor?

Increasing nitrate depletes alk. Is nitrate rising?

 

[ivanotas]

nitrate is at 0.1ppm. i am using Rowa lith W as media. Appreciate you can guide me along.
I am still measuring 500 on calcium. ICP test is asking me to do water change due to high calcium.