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To me it looks like they're reaching for more light. Mine were what I would consider perfectly expanded...then I beefed up my lighting, and now they're only expanding about 1/2 what they used to. I'm planning on moving them down to the sand now.
Increase light (slowly over a week or two...if you can)...and see how they react. Once they are expanded to the point where each head's polyps blend in well with one another...I'd say you're good to go then.
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Josh
Current Tank Info: 90g mixed reef w/ 55g sump/fuge.
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