I seen the top-left bottle but I can't remember what it was.You have two bottles of Kent Essential which is a trace element repenisher.Since there's no way to test every trace element use sparingly.The Liquid Reactor is a calcium and pH/akalinity buffer.You may need to get some media bags for the bottom three and place in an area where water can pass through the media.
Oh, and the Coral-Vite is very similar to the Essential Elements.
I have used the Seachem De-Nitrate that you have, and found that it worked well. You use it just like carbon, in a filter sock or bag and put it in an area of high flow in your tank.