Is yours not doing well? Looks good in the pic. Mine does well in a similar situation to yours...on driftwood near the filter overflow. I dose flourish 4x a week and api leaf zone once a week. Had since jan or feb and it has put out leaves and roots steadily.
Mine has put out lots of roots. Not so much for new leaves.
There's nothing wrong with it - it has good color, and hasn't lost any leaves. Just growing v-e-r-y slowly.