IMHE. it needs reasonably strong light (not the lowest light coral), mine didn't grow under 18W 50-50PC, but grows well right under 55W PC, 10,000K).
Feeding by mouth-sized food (smaller, then cyclop-eeze) is necessary (again, IMHE: frags didn't survive in neither basic mixed reef, even in good light, sunlight + PC, or in red finger gorgonian tank, fed by cyclop-eeze and someZoPlan, good enough for gorgonian.
Grew slowly in another tank, fed for sun coral and gorgonians (same 55W PC), started to grow faster, when feeding and more flow for scleronephthya and dendronephthya was provided (same 55W PC).
Maybe small-sized food, every ~2 hrs, good flow and light, of course, were necessary?
But: 18W and 55W could be different species: Lemnalia, Neospongodes, Paralemnalia looks quite similar.
18W + gorgonian feeding, same in basic mixed reef + daylight was:
55W + dendronepthya feedings is:
Take a look at this
thread,
this,
this,
this this and I can't find thread Lenmania or neospongodes?. GARF has some pages on them.
Reeflex has ID page.