I've always had good luck with macros, I always use iodine regularly. We used to mix up our own but now commercial preps are out and safer, I guess. I always use a coral vitamin supplement and an essential element supplement also. If you are really interested in learning more about raising different macros I would start by:
1. not having fish that will wipe out your starts. (That's the obvious one)
2. Having good "live rock". Something that hasn't been out of water for more than a day or so. We get some really great Florida aquacultered rock in at the shop that has everything on it including live corals.
3. using the afore mentioned additives, especially iodine. This will get me in hot water later but next to kalkwasser I believe iodine and vitamin c are some of the most important additives for a reef, thanks to Albert Thiel and Julian Sprung for that one. I use it very sparingly almost daily.
If your herbivores are in control,(no crazy tangs, angels, urchins, etc.) things will start growing out of the rock, especially Florida or Marshall Isle rock. Years ago we would grow the stuff just to see how weird some of the plants were, and nine times out of ten we could never get them identified.
Anyway plants are good! Grow more plants! Just don't let them spear your elegance corals(eh never mind, we can't keep those now), LPS.