OK, I'm new to Acans so this question may sound stupid , but here goes. As far as them growing new heads and such, do I need to place a disc or rock next to the colony so that the heads have someting to spread onto ala Zoa, or will the entire colonly just expand the skeleton/rock that it is on? I hope this makes sense.
I'm just not entirely clear on this. I have an acan that has about 5 heads and small heads are forming at the edges of the colony. Will the entire thing just continue to expand or will the new heads need to spread to something else?
Thanks