New tank high alkalinity

[Basile]

Ok well this tank sure has its mood swings; my fresh sw has a 12.1 KH , and this afternoon i took another reading because my stool was out and fully extended, reading 11.5 KH so the tank is making adjustment by itself, and the fact that my skimmers is taking out stuff might have something to do with it, someone mentioned the breakdown of of nutrients who knows, i might of caught a spike in the process. very interesting anyway thank you all..