I bought a single head of green branching hammer back in early December and have experienced no growth at all. It's still the same size that it was when I brought it home. It's about 18" from T5s in the bottom of my tank with lower medium flow. I'm just wondering what kind of growth rates I should be expecting or if there's anything I can do to speed up the process? I feed coral frenzy twice weekly but haven't been target feeding until this past week.