One of the books I was peering through, I saw a common between all of the corals, Light is needed to some level. On the feed charts of sps, & most other corals, I saw, Lighting, fish poop, & other poop, as necessary foods, it seems to be a multitude of food sources they all feed on, not just one. In a closed marine environment, this may sometimes be difficult to replicate, even harder to feed for each individual need that isn't common in our routines of feeding. Target feeding would be the only supplement to getting each individual what it doesn't get, well unless you feed everything you can throw in!