This has been posted and referenced many times. Who cares? There is no evidence that it did anything. Also, you have no idea what is in those bottles that you are dosing. Are there even real aminos in there? If so, are they the right ones? Would a coral like to use aminos more than ammonia or ammonium? Can a coral outcompete the single-celled organisms in a tank for the aminos?
The most important thing about that article, that nearly everybody misses is that concentration of aminos in the water has to be pretty high for uptake - likely higher than any of us would ever do. Does anybody even know how much of a concentration that they are adding?
Seriously, just stop dosing stuff and see what happens. There were lots more studies than this that said that Phyto, rotifers, marine snow, oyster eggs, etc. where all super important - it is amazing that we can have tanks anymore without this stuff. Everybody was convinced that they did so much, then they stopped and could not even tell.