I've got the exact same problem with my green chromis...still haven't figured out how to get him to eat. If you find something that works, let me know.
In order of setup:
FW1-16g, 5 Zebra danios, 4 Pristella Tetras, 4 Black Skirt Tetras, 2 Gold Barbs, 1 Brush-nose Pleco
FW2-5g, 1 Baby Gold Marble Angel (raised from fry), 6 Zebra Danios
SW1-75g, (80# LR
), Scarlett hermits, Turbo snails, Percula Clownfish (Gizmo), Oscellaris Clownfish (Whizzer), Indian Yellowtail Angelfish (Mikado), Royal Gramma (Orpheus), Black Sailfin Blenny (Casper), Yellow Tang (Pele), Racoon Butterflyfish (Raptor), Lyretail Anthia (Juliette)
FW3-30g, 2 mated Gold Marble Angels (Oscar/Yenta)
, currently empty
FW4-30g, currently empty
FW5-20g, 2 Gold Angels (non-paired)
SW3-35g (REFUGIUM for SW1) - EVIL ChocChipStar, Nassarius and Turbo snails
SW4-55g, 4 BlueGreen Chromis, King's Crown snail.