Two-Part or Three-Part?

[Rickyrooz]

What are the essentials for the DIY calcium and alkalinity supplements? I am dosing calcium chloride and baking soda directly into my tank, I do not pre-mix with RO water. Since I am not using B-Ionic do I need to add magnesium chloride/magnesium sulfate (Epsom salt) every time I add the calcium chloride or should I add the magnesium when my levels are low? Will dosing only calcium chloride and baking soda cause an imbalance? I perform 30% water changes with Tropic Marin Pro Reef every two weeks.

 

[coral diver]

Magnesium is the balancing part of the two part (cal & alk) if its out of its parameter it will be hard to raise your calcium and those 3 out of 5 test i do check every week the rest is twice a month
weekly test
mag
cal
alk
ph
sal