Actually, that yellow belly I've had for many many months. I bought it before it was eating, because it was such a great price. It lived in my remaining reef for a long time. Then I finally tore the reef down, and moved it into QT (with the PBT and a couple other fish), where it slowly started eating HBH spirulina pellets. It still doesn't eat with gusto, but now that it decided to eat smaller, easier to swallow ON Formula 2 pellets, I think it will gain its weight back. The PBT and other fish have since been moved to the FOWLR.