[Myka]

I use H2Ocean in my reef tanks and really like it. I do add magnesium to it when I mix it up - 1 cup magnesium chloride for every 10 gallons.

I don't care for IO in my reef tanks, but I do it for my fish only tanks.

EDIT: You would be able to solve your high calcium value (as seen in your other thread) by switching to H2Ocean, and your alkalinity would sit a bit higher at around 8 dKH.