new frags!

[daugherty]

and the more colorful they the longer it takes to grow usually

 

[Bifferwine]

Brown zoanthids will start sprouting new polyps in a matter of days. I had a colony of very yellow (expensive) polyps, and for two years I didn't even get one new one. And then they all died. Daugherty is right in that the more expensive ones grow much more slowly. But for average zoanthids, you should see growth within a few weeks.