Hi to all reefers I need help from you expertise I'm a beginner in marine tank just set up my tank 2ft square tank the tank have been Cycling for two months but I don seem to understand why my dkh is at 13.9 can anyone teach me how to bring down my dkh on Friday I just change 50 water change n still the same the rest of the parameters are all in stable condition only my dkh is very high thanks