The directions can seem a bit confusing but basically it's pretty simple. You start out with 2 ml of tank water and put it in the large "test tube." Add 1 level spoon of the purplish crystals(Ca-1) but don't mix yet. Then add the 8 drops of the Ca-2 and swirl the mix for a few seconds, gently.
Here's where it might be confusing you. Put the enclosed plastic tip on the 1 ml syringe and put the syringe into the large bottle of Ca-3. Make sure that the plunger is all the way closed. Now you're going to draw the liquid into the syringe until the little black rubber O-ring is exactly above the 1.0 ml mark (remember, it's upside down right now) The idea is to have exactly 1.0 ml of the fluid in the syringe. Now drip the syringe fluid into your earlier mix a drop at a time while swirling it between drops. No need to count the drops. Keep doing this until you get a color change from the pinkish red to clear blue color. Once you get a color change, hold the syringe with the tip facing UP and look at the black O-ring. You want to be able to see how much liquid is still in the O-ring. The amount of liquid in the O-ring will tell you what reading to use in Step 6. That will give you your Calcium level.
One thing to keep in mind is that if you have a Ca level higher than 500, you'll use the entire syringe of fluid without a color change. If that happens, fill the syringe up again, all the way to the 1.0 ml mark and drip more into the mix. When you do get a color change, you'll read it just like you would at the beginning and then add whatever your results are to 500 to get an accurate Ca level. For instance, if you use the entire syringe and fill it up again and then get a color change at .60 ml of your second syringe, .60 ml corresponds with 200. Add 200 to 500 from the first syringe to get a Ca level of 700.
Hope I haven't confused you even more than you already were!!!