New Reefer
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!


Advanced Reefer
Bellmore, NY
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

Experienced Reefer
This is my duncan growing new heads For reference


  • CC5A5B64-9335-4D75-AAD9-BE8E3EB4A6D3.jpeg
    122.9 KB · Views: 0
  • FD5C3DC6-E5B0-4CA1-BA31-2ADDC5864D0A.jpeg
    135.3 KB · Views: 0

Sponsor Reefs

We're a FREE website, and we exist because of hobbyists like YOU who help us run this community.

Click here to sponsor $10: