Yep BRS is the same mix as Warren and Dave said , 5 / 3 mix

Thanks guys for the confirmation.

It calculated that to raise 100ppm of 200ga total volume, I'll need 1612.9 mL. Does that sound like a sensible number? That's like almost 1/2 of the whole mixture lol.

That sounds about right. Dump half of it in and test in a few hours.

It takes a lot of mag solution to raise the numbers , much more compared to Alk/cal

Use the following calculator:
http://reef.diesyst.com/chemcalc/chemcalc.html

George beat me to it. But you might also find this article on DIY Magnesium supplementing useful. http://reefkeeping.com/issues/2006-07/rhf/

Will add 750mL tonight (half of the recommended dosage) and check back with a Mg test tomorrow morning. My levels are all pretty low since I haven't dosed at all since the tank began 3 months ago, all I've done are simple 25% monthly WCs. Still working on getting N and P down, Foz-down since last month and vinegar dosing recently.

What salt you using?

In the interest of you becoming a mod, I shall leave this information secret. :lol:

Nah but for reals I'm just using regular IO.:wink:

Ya, don't tell them anything, they'll use it against you one day!!