Polyp extension

[Aquattro]

What type of corals are we talking about?

[GreenSpottedPuffer]

Mostly all my sps have the most polyp extension during the day and only retract a bit after lights out. I don't do anything special. I do have some acros though that seem to have little polyp extension in the day and more at night but that doesn't seem to be the norm.

I know that doesn't help really but just an observation. Stuff like Millie's seem to have fully extended polyps all the time as do my gorgonians and I guess even zoos.

[Aquattro]

Most of my SPS always have polyps out during the day. I've never done anything special. Most (all?) SPS I've seen at night have polyps out, especially on the axial coralites.