...as a system either on its own or to supplement some more complex strategy for dosing. But in any case, these are definitely not the same thing.
Perhaps @Randy Holmes-Farley or one of our #chemistrygurus will come in and explain better than I can (and correct anything I may not be saying...
This study does line up with most everything I've read on corals in higher nutrient systems.
Perhaps @Randy Holmes-Farley or some of our other #chemistrygurus might have more input on the questions you're asking about why.
I think it can, but you'd have to use a good bit of it in a standard sized tank for it to have impact. At least that's my understanding. Hopefully one of the #chemistrygurus will weigh in.