Not too long ago I posted that one of my anemone's split. Now another one has split. I took a few pics to share...
and these are bubbletips by the way.
This is one parent. You can see where it split.
sorry Speg, didn't see your question in the middle of the pics.
The answer is no. You can have just one and it will split. I have been lucky that these are happy and are reproducing.
The only downside is I will have too many in the tank soon.
