Theyvall have different personalities. Powder Blues are nice, but prone to ich. Yellows are common, and can be very teritorial. Don't get me wrong, I love tangs, just needvto decide which one you like most versus which you mihht get instead.
Your Aquavitro Salt is not designed to be mixed that long. Per Seachem, their salt mix starts losing it's alk content when mixed more than a day. This is the main reason I quit using rheir salt.
You have a total of 7 fish listed, both current and possibly planned. That is first off a fish too many for that tank. A blue tang can get 12" and requires a 180 gallon tank. The yellow will rven be a bit cramped in a 55 as it will become the dominant fish in the system.
Well, first off.............. what size tank do you have? That will tell you how many bulbs to run over it. What type of corals are you planning on?
The bulbs you have listed are not what I would consider. Look at the ATI bulbs or the Geisman bulbs for your fixture.