drummereef
Team RC
Yep, it's those daily, weekly, monthly fluctuations you're trying to avoid. 2-part like capn or myself prescribed is best dosed daily. That way your levels never fluctuate drastically like they have been just dosing weekly. It's still the alkalinity I'd be concerned with. Your corals will suffer much more/faster with swings in alk. Again, baking soda is all you need for that. The Kent product is basically overpriced baking soda in a nice bottle btw.
Just be sure to use that calculator whenever you dose. 