Zen, add the recipe 1 calcium according to the calculator, and recheck your levels after a couple of hours. If they are where you want them, start dosing equal parts. With the 3 part system, you can adjust one or the other without causing a problem. You should also try and get a mag kit so you can see how much you need to dose, as you should never add anything to your tank without being able to test for it. Then after you get that level where you want it follow the 1 gallon to 2 1/2 cups. This is not a very scientific measurement, but it does seem to work out about right.