Just use a good salt. Supplements aren't needed save your money for other stuff
i already have a tlf with gfo and carbon running but if i dont have to i dont want to do wc every other week would rather do it once a monthsupplements are a scam. alk, cal, and mag. spend your money on a better skimmer and lights. and sw mix which you already have. then i would spend money on a doser to dose the alk, cal, and mag, and maybe vinegar. you might need gfo one day.