This is my first favia coral. It’s been looking a bit funny with this whitish pink showing up. Is that the skeleton? My tank has had issues with too much light so is this a sign of bleaching? Advice needed please so I can see it flourish again!
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Alk:7-8Looks like it's partially bleached to me. You didn't list what your parameters are or what you dosing/supplementing. A PO4 deficiency will cause corals to be very sensitive to bleaching as well as labile DOC (carbon dosing).