- Joined
- Jul 17, 2017
- Messages
- 37
- Reaction score
- 26
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Tank parameters?
How old is the system?
How long have you had the colony?
I don't think that's an acan, looks more like a chalice in the pic.
I am 99.9% sure that it is an acan echinada but then again I have never had a chalice so I cannot be 100% certain but on the first picture on the left hand side I can definitely see something is messed up with the coral
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That is more like it, an echinata.
Looks like it receeded a bit on the edge. Could have happened from a number of different things. Keep an eye on it to see if it keeps going or starts to heal
What do I do if it keeps receding do I have to cut off the dead part of the acan as to stop potential, further, necrosis or do I just find a better suited place in my aquarium for it?

