ya i was having troble with it growing just useing a small fishtank strip light so i swaped to a clip on lamp and a 23 wat bulb that i spent 10$ on and its growing great now, havent had to prune it yet but in sure i will in anouther month or two. this tank is almost 6 months old now to let all the corals grow in so it looks more like yours biff :)