It's caramelized.Burning banana?
What PAR is it under? 50 blue 18 white doesn't say a whole lot. Some parts of your tank may have 300+ PAR while others 20. This coral doesn't like much light.My burning banana stylo polyps won't come out during the day but seem to open and night I have no angels to pick on it alk 8.5 cal 415 notate 15 phos .0.06 I have my lights on 50 blue 18 white on reef breeders