Well, he took one large silverside tonight, but that's nowhere near what he should be eating. After that first bite he realized the tank top was open and started trying to get out... Tomorrow morning I'm moving him to another room to see if that helps at all.

I may also try just essentially blending some pinkie and fish bits into mush and leaving them on a dish in his tank for a little while. That's how I got him to eat when he first lost his sight. Didn't get a lot of food that way, but when he happened to notice it he'd sometimes take a bite.