That is odd. My one ate all the hydra she could find within the first week. Never seen any since. Have actually thought about trying to grow some for her lol.
I need to hire you to train mine!! I haven't noticed them eating any at all but I still am glad to have them. They are doing great in the QT and are really pretty fish. I am going to put them with my GBR's when they are ready.
Never thought of the library - will have to check that out!! Sorry to hear Marley lost his friends - hope you can find him a companion or two. It doesn't sound like the cory is enjoying his attention. Just told them hi from you and Marley - they said hi back to you (at least in my little world they did).
I am gonna go the hunger route soon, still getting them conditioned from their WM experience.