Marbled knife diet...

[Racersk]

Update week 2.

Lump still visible, but the sores have started to heal. The lump is getting smaller, so it'll live. I pulled it into a hospital tank to better asses the situation. one more week and it goes back into the big tank.

 

[benzjamin13]

Knives do eat crustaceans in the wild, so it should be okay. It'll probably take awhile for the shell to digest. Try to feed it some fiber like Peas. You can shove a pellet into the Pea or gut load Silversides with Peas.