is this bad?

[Johnny Reefer]

To quote Baensch Marine Atlas Vol. 1, page 238.

Halimeda opuntia..."An aquarium with these calcareous algae will surely certify the expertise of the aquarist."

Appears to this newbie that this stuff is an indication that things are goin' good. Oh ya!
My 4 month old tank has a tiny bit that came in with some live rock. It's not growing profusely, but it is growing, so I consider myself lucky (in part). I think anyone with healthy Halimeda should be elated.