I just got back from vacation and my pulsing xenia split into 3 different stalks to nearby rocks. All three colonies are shrivled up and not pulsing. I normally do a water change every 2 weeks but I'm 1 week overdue. Before I left for vacation the xenia was huge and growing like crazy. I haven't checked my parameters this week, but everything else is doing fine. I this normal behavior after these things multiply?