This is one DEEP post...mann..
Ed if your a newb then I need to learn how to be a newb..lol...
Phong, your like a vietnamese Manny Paquiao bro...get some sleep =D
reefer, spend the $10 bucks on a test kit mann....youll find its WAYYY easier than any type of current calculations your currently running with less margin for error. When i first started our tank up, i thought "there has to be some sort of mathamatical equation to this whole thing" and set up an IV drip system for the tank. all major parameters were covered, but to my avail, things went to crap...calculating the calcification rate of multiple species in a tank along with the increasing need of supplementation is a major PITA...
While a happy meal might satisfy a person at 3 years of age, the same happy meal might not have the same effect when he/she is 30 years old....calculating the basic caloric need on a day by day basis and feeding a growing child is similar to what you are currently implementing..as our corals grow, they require more of everything...making that work in an equation with so many variables would become unrealistic after a while..
Now getting a test kit is kinda like turning to that same happy meal kid and asking "are you hungry?" ....after testing, youll know right away what you need to add or discontinue adding. Itll save time and effort on your part..i calculate doses of antineoplastic agents with a very narrow thereputic range for chemotherapy patients everyday, but refuse to find an equation that suits my tank...HTH