I have a 90 gal, I will have to check the specs on my lights, but my friend has the same lights and his nems are doing great. This one did great for like 6 months, she got like that when the clowns started to have eggs and were not looking for her.
I have the same problem, but mine has been like this around 4 months and don't open. I included a picture of how it is right now. The tank has more than 2 years and all other corals are very healthy. This happened when the clowns started to have eggs. Please any help would be appreciated.