I just got a baby blue tang, its maybe half an inch long. I had 2 healthy zoas that were thriving in my tank, and now the tang is nipping on it! it is only nipping on the stump of 1 of my zoas, but the zoa is closed because the blue tang won't leave it alone, the tang spends a majority of its time swimming around that zoa and nipping on the stump. Is there anything I can do? This is my first ever zoa and it was doing so well. I don't want it to get ruined. Please help!