For reference, my tank has around 2ppm nitrate right now and I just removed 15 bubbletips from my collection of around 40 to 50. Historically the tank has been between 10-16 but has been at the lower end for the past few months. I feed fish food (flakes and pellets), reef energy, and live phyto daily.
If there is a clown fish hosting the anemone, this will also help as they supply nitrogen to anemone.