i have been doing fine with my calcium parameters, they are around 400-440 ppm, but i cant seem to get my alkalinity straight. it has been stuck between 12-14DkH. The last water change i did was 3 days ago and the last time i added carbonate was a week ago but it still stays between this range. I have only been adding the calcium every 2 to 3 days to keep that in line. The salt i use is neomarine and the test kit i use is an api. Any simple solutions to this?