I've had the brown leather (top right) for about 4 months and it opens fully daily and is also growing well. The yellow leather in the front I've had about a month now and it won't extend its polyps. I do add iodine. It was extending in the shop I bought it at and did for a few days after I brought it home.
Any ideas why the yellow is not extending?
90 gal mixed reef
MH/blue actinic
spec gravity 1.025
Alk 9dkh
Cal 420
temp 76
pH 7.9

