just good lighting..good calcium and alk......good water quality...and thats all you can do
I add coral vite, coral accel, iodine, stongitum(sp), and clacium but this is only because i don't do water changes
i add 5 ml of the coral vite and accel eery 2 weeks
5 ml of iodine every week
10 ml of strongitum every week
5-15ml of B-Ionic daily..depending on the calcium level