Can’t tell from the pic but usually asterina unless the red center target Coral, when Coral dies the skeleton can grow a light film of algae which is possible that’s what the amasterina wasn’t feeding on?
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Always looking for the next best coral...
90g starphire cube/400mhRadium20k/2 XHO/2x27w UV/2x39w T5/ 3 Trulumen led strips
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