So why is it you can only raise alk by less then 1 dkh per day or mag by 100ppm a day with dosing. However, when you do a water change you can raise them well over that amount depending on that salt you use. For instance with kent salt I consistently test at just over 10 dkh however I run my alk at say 8.5 When I do a large water change it puts me well over 1 dkh per day. Note these are not actual number as I try to run way closer to 10. One of those food for thought things.