@aslam I'm dosing Seachem Fusion 1&2 via a doser. About 30ml Alk a day and roughly 30ml CA a day.. dosing is split into 4 doses for ALK and Ca, two during the day and two at night. This prevents swings and keeps levels constant. Mg is always high due to it being incorporated into fusion 1, I test for it once a month but never need to dose it as the level is always good.