i agree with gwen... if using a good salt regular water changes shoudl be aebough to keep up..
either way, you should not not dose what you arent testing..
so make sure you test for the
Ca,
Alk, and Magnesium at the least.
then dose as needed.
as you see the answer here is very easy... you dont need our opinions on this, if you test you will "know" what you need to add..
HTH..
