My sucker fish will eat any little fish we add. We started giving her blood worms and shrimp to eat every couple days and throw in spinach and cellary ect she even like carrots but they need to be agged to be a bit soft first. Giving her extra helps algea waffers aren't enough. The last fish we had disapear was old and looking it. I think now she just eats them after they die. I made the mistake of putting one of those tinny frogs in there when she still wasn't so huge and it dissapear fairly quickly. So nothing real small in there with her.