Ive seen tanks with halimeda and many tangs of the genera zebrasoma & acanthurus... never saw them munch on the halimeda, neither did the owner(s)... although, the tanks had a lot of other macro so I assume the tang would choose the softer macro over the calcareous halimeda.
Drew
I just purchased some halimeda last week. I have 2 tangs. They have not shown any interest in the halimeda. I have brought home calerpa in the past and they love it. It usually disapperas in a couple days. I think the halimeda is too course and big for the tangs.
This thread was originally posted about 1 - 2 month ago. In that time i was curious if my purple tang will eat Halimeda. Fortunalely he doesn't. He has a lot of other stuff to pick at. But now algae seems to be dying and i cannot figure why.