Hello Kenny!
I also use the seachem test kits and am upgrading to Salifert as I run out. I found the Seachem pH test kit difficult to read. Run the control solution and read it to see if you are reading correctly. I was discerning 1-2 points off with that. (low).
The alkalinity looks good. With the info you give, 20 drops divided by 2 = 10 dKh. That is good.
Calcium kit is not calculated by drops. Read the directions again

You need to add the correct amt of tank water, plus the pink vial full of ro/di or distilled water. Add the powder, 1 level scoop after 30 seconds . Then fill the syringe all the way to the 1 marking. Then, you don't need to count the drops. When it turns true blue (it will go purple and then 1 more drop should turn it blue) the read what is left in the syringe and look at the given chart on the directions for your reading. You want it to be around 400-450.
Also, get a magnesium test kit. Check that as well. It should be around 1300-1400. If Magnesium is not high enough, you won't be able to keep the calcium up either no matter how much you add.
The one rule I will give is , if you are putting in a supplement, make sure you TEST for it. You can oversaturate you water and cause all of it to precipitate out, causing what looks like a snow storm in the tank.
I would not put all those other additives in until you decide what you need, based on what you want to keep. It is also possible to retain all trace elements with a good salt and water changes if that is the route you choose to take.
You probably won't be able to keep SPS (small polyp stony) corals with the lighting you have.
You can start with soft corals (xenia, star polyps are pretty easy) and maybe some large polyp stonies that don't need intense lighting.
What types of corals do you like and are you thinking about getting?
Also, if you go to your Profile and edit the Sig box, you can add your tank details and it will show each time you post to help us help you!
Sorry, it would appear that I have rambled on a bit...
_________

I Love My Sig By John Hawkins!!!!!!!!!!!!!
Date Started 9/04 58 gallon Oceanic Tank, 20 gal DIY sump/fuge w/ Kent Marine Auto top-off, Air Water Ice RO/DI, 10,000 K 175 W MH, 2 VHO 03's 96W each, AquaC EV 120 Skimmer
80 lbs LR, DSB in FUGE, 1 - 2 " LS in tank
Black Brittle Star, Chevron Tang, Crocea Clam, red & green Lobophyllia, Frogspawn, Porites Frag, Caulastrea Frag, Green Ricordia, Asst. Zoas, hermits, astreas, stomatellas, fighting conch