+1 on electricity ... cost of salt, compared to other stuff is neglectable ...
I was the same with my dog ... he was not living in his natural habitat, so I fed him as much as I could, so in his next life he can brag to free dogs that at least he had the most/best food ...

haha
instead of adding coral foods and amino acids, I just feed my fish ALOT, and good foods, with AAs, so they can consume it, be happy and fat,, fight less and pick on my corals less, while their poop serves as the best food for my corals, as its rich in Vitamines, and also feed my zooplanktons. lastly, one of the most amazing sights of a reef is feeding frenzy to me ...when all small and big fish come out and eat ...
so I basically adjust my feeding, with how my corals look .. pale = more feeding [which I do not see with this much food] and brown or algae = feed less ... [I usually cut on mysis ... as I feel like the NLS pellets are really good at coloring up fish. and holding up vitamines.]