AA............... there were written so many threads about that, even my own
https://www.reef2reef.com/forums/general-sps-discussion/142538-power-up-your-acropora-corals.html
I have used many AA and really there's no difference than only the price.
The trick is to come to a judgment is that you use it for while (8 to 12 months) in order that it really takes effect.
The fastest results I've had was with the AA from KZ (zeovit) but I might also have to do with the complete system I was running on zeo.
Your tank need to be close to NSW balance all the time in order to have good results and that has nothing to do for what kind AA you using.
Most if not all AA are good products, you just have to stick with them even if you don't see results.
With no results you might start looking into the ultimate PO4 export or balance between K and ALK not to mention the over skimming that most ppl do on their tanks.
Light and flow in no particular order has something to do with better color.
That all said just don't think there's a magical wonder fuel that makes your tank as like no other.
I have seen many tanks, some looked out of this world as others I was wondering why ppl are in this hobby, but we have to start some where.
As many agree as they are facts and we all know it, stick with what you have for a while make small changes after doing research and only bad things happen fast in this hobby.
