2-part + Mag dosing is defiantly the way to go ( I personally prefer Kalk via top-off, but that has it's limitations). Since you are a first time user I discourage the DIY route of mixing your own chems. To many errors to make as a first timer.
I would suggest using Brightwell Reef Code A & B liquid for your Cal/Alk needs and Magnesion for your mag. These are all pre-mixed and ready to dose. You can also use EVS 2-part and maf, they make great products as well. Once you dial it all in and understand the chemistry behind it all, then you could consider DIY chems to save a few bucks.
The MOST important thing to remember is to be as consistent and stable as possible. Don't worry too much about raising your levels, worry more about keeping them steady and balanced. The best method to keep things constant is using a QUALITY dosing pump like GHL. It runs for about $400 vs $200 for a lower end pump. The $200 difference is a very small price to pay for piece of mind.
Shoot me an email if you need any more help
http://www.reefsupplies.ca/online-st...us&mode=update
thanks,
Ray