High PH but normal paramaters...

Well ive had a very stable PH of 8.15 to 8.3 for the longest time, except for the past week. I really have no idea what might of changed.



I do run Kalk but ive even stopped my Kalk drip and it will not go down its hovering at 8.4-8.44 day and nigh around the clock...



My paramaters are as follows.



Salinity 1.025/1.026

Magnesium 1280

Calcium 425

DkH 7.8



I just did a 15 gallon water change on my 60 gallon tank thinking it may bring it down a bit, however no go still at 8.4



The salt mix i added was IO reef crystals and i tested all the paramaters of that before adding it as well



Salnity 1.026

Magnesium 1480

Calcium 500

DkH 10.8



I just did the water change withing the last hour. Ill test to paramaters of the tank in another hour or so.



Any idea on how i can bring my PH down again without affecting other paramaters. Being at 8.4 is really on the high end and im not liking the fact that and slight change in evaporation could increase my kalk drip putting it into the danger zone.