Brains can be aggressive at any time of the day. I have a brain that starts doing this when I need to change the carbon. It's not close to anything, I think it is just a reaction to chemical warfare in the water column. I have lots of GSP (which is a photosynthetic gorgonian btw) on the back wall of the back, plus several other photosynthetic gorgonians which have the potential to all be quite aggressive. So it may be the gorgs that are bothering the brains.
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~ Mindy
SPS fanatic.
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