Acan Colony Question

[Steve2020]

I have this Acan Colony that has been in quarantine and will be going in my display next week. Question is the narrow end of the colony is not flat. Bends upwards about 3/4 inch from the bottom of tank. I want to place it on my sand bed so should I place a small flat rock under the raised portion or will it over time grow and bend downwards? Any recommendations on placement would be appreciated. Photo was taken a few weeks ago 5 minutes after being dipped and put into quarantine so it was a little upset. When puffed up all gaps between heads are completely filled in. Nice piece from Austin Aqua Farms.

 

[T-J]

My acans do better when they are not on the sand. I've mounted mine on rocks, so they can grow how they please.
They will grow based on flow/light.

 

[ZoWhat]

Lifted up.

They'll either continue to grow flat or in a dome shape

 

[Steve2020]

Lifted up.

They'll either continue to grow flat or in a dome shape

Not sure what you mean by lifted up?

 

[New2Reefn]

This colony was similar to yours when I got it and it has completely domed. I added a node to my arch so i could raise the base a bit where it sits now so the outer ring polyps had plenty of room to extend