gsp not opening

docta09

Reefing newb
I've had them for about 4 days not and they sometimes barly open. Other Corals are fine should I be worryed about them?
 
I had the same problem and it turned out to be GSP-eating nudibranchs that rode the colony into my tank. Was probably just eggs when it entered my tank, but they hatched and wreaked havoc on my GSP. Fortunately, they restricted themselves to the GSP and left everything else alone. But they decimated my GSP. I only realized I had a problem when they completely killed the coral; then they started bailing out like rats from a sinking ship. The coral skeleton was about 1 inch by 2 inches, and I think I pulled upwards of 40 nudis off it! Try doing a freshwater or CoralRX dip and seeing if anything pops out....
 
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