What is in the all-in-one additive? Most are not worth the money. A high quality salt mix will usually provide all trace elements and a good food will provide micronutrients.
will appreciate some small foods, something like frozen oyster eggs or even Golden Pearls (a powder like pelleted food ideal for corals, fish fry, etc.). Anything fed to them should be limited. Any food in is nutrients in, which can promote algae. Too much and you will favor the algae and not the corals. Target feeding is ideal, depending on how many SPS
you have and how they are arranged. feeding just upstream of the SPS