Our tank has been up for a while now and we introduced a honey coral about a month ago. It has grown quite alot and is fully open during the day and closes at night.
Over the last week I have noticed that one half of it looks dull and a brownish colour almost like an algae is starting to grow on it (it is not very clear in the picture but was the best we could do).
Our levels are as follows:
nitrate 10 (due water change tomorrow)
The only change to the tank in the last week is an addition of a bubbletip anemone and a serpent starfish.
As the coral was thriving and is still opne and happy I am reluctant to move it within the tank.
Does anyone know what might be happening or wrong with my honey coral?