Help get my mag Lower and PH higher

[Cozierchalice16]

These are my current tank parameters can anyone explain to me how my mag got so high? I use Red Sea coral pro salt , my coral are colored up nicely however, growth seems to be slow, but that may be due to my pH only getting to 8 at peak . So any suggestions of how to get my mag lower and my pH higher?

 

[Cozierchalice16]

Also, I don’t currently dose anything I only run kalkwasser in my ATO and replace major elements with water changes once a week