Dosing magnesium

[Myka]

I missed answering the "and why?" part of your question... The way I do it is easy, it works, and I don't forget it. I add potassium in the same manner.

[Delphinus]

As Myka stated it takes a lot of Magnesium to raise a Mg reading in a tank, so don't be shocked.

I just top up my SW, I know how to much to add to make my ingoing water 1500Mg and that seems to combat the Mg drain just fine. I was using Mag sulfate and Mag chloride from Eli and use the same dosing instructions as per BRS..