Duncan growing new head?

[Sawyer]

Hi guys, I just want to make sure if my Duncan is growing a new head.
Previously it's doing pretty good and fully extended (at least IMO).
However, about five days ago it's not extending fully (occasionally it does but not lasts long).

LIght: AI PRIME 16HD using David Saxby setting running an acclimation mode
Water para:
0 Ammonia
0 Nitrite
Nitrate undetectable
PO4 undetectable
PH: 8.0
CAL: Around 400 ppm
I am using the API test kit so the values are not accurate.

Thank you in advance!

 

[Josh]

Possibly, but it doesn't really cause them to retract all the time, they just sort of bud out the side or they split as they grow out.

 

[chemisfun11]

I have duncans that started to close up like that. It might be worth a dip. There could be a pest irritating it and causing it to close up. Worth a try since I went from one polyp to 10 since then. I do feed reefroids about once per week too. Hope that helps you out! Good luck!

 

[Jean estevez]

This is my duncan growing new heads For reference