How much Magnesium to dose?

[rishu_pepper]

Work has slowed me down previously but now I have the time to start setting up the dosing regiment.

Currently my levels are low, and I realize that it is best to raise Mg first, before tackling the others.

Recently I purchased bulk magnesium from reefsupplies.ca, the magnesium chloride/sulfate mix:

http://www.reefsupplies.ca/online-st...-1-Gallon.html

At a current level of 1150ppm; I would like to raise/keep it at 1350ppm. The problem is, the product didn't come with a chart on the proper level/dosage. There's two bags of stuff, one MgCl and the other MgSO. It says the two bags make 1 gallon of solution but that doesn't really help how much volume I should dose? It does say it's 5 part MgCl and 3 part MgSO.

Is there a proper online calculator which will allow me to see how much to dose? Thanks!

(total water volume is ~200g)