Why are my zoanthids wilting?

[Beverly]

I was having a few of my zoo colonies not opening fully for the last couple of days. Today was turkey basting day so I can siphon out crud from my BB tanks on water change day tomorrow. Lightly basting the zoos opened them up nicely. Don't think I have a water flow problem as there is moderate movement throughout the tank. Or at least, that's how it appears to me.