Have you changed anything in your tank lately, lights, water movement etc ?It does look like something is stressing it. Has the coloration changed ? With it not able to close it sounds like its "gaping"
__________________
Mike
150g reef, 55g sump, T5's, Vertech 200A, Profilux III - German made is highly over rated, should just say Gerpan made.
Reefkeeper - individual obsessed with placing disturbing amounts of electricity and seawater in close proximity for the purpose of maintaining live coral reef organisms.
|