How can i help my chalice?

[masonmiles99]

Just moved it onto the sandbed in the shade because it looks like its showing its skeleton, parameters ive tested are all relatively normal 1.025, 10ish nitrates, good ph

 

[masonmiles99]

Flow is moderate it isnt getting blown around but nothing piles up on it

 

[masonmiles99]

Other healthy coral in the tank are a hammer, two duncans, pocillophora, 3 acan colonies, 3 mushrooms, and a stylo, purple star polyps, rock flower anenome, galexa, candy cane, all healthy