Please post emergency if:
Tank leaking
Fish and/or coral dying
Tank crashes
Crisis. Situation
There are many with true emergency and such threads delay assistance to those who need immediate assistance
regarding your question, once butterflies especially focus on coral rather than food, rarely do they switch to food and pick on coral instead
I would refrain from any fans until it focuses on food only
I have a near 6@ CNBC that is interested in food alone and is a glut at feeding