Does anyone know how long zebra danio's can go without eatting? The reason I ask is becuase if I go out of town for two days and I don't have anyone to feed them for me do you think they will be ok? I have done that with my black ghost knife fish several times I just feed him real well before I left but I wasn't sure about the danio's. I know they have those automatic feeders but I don't know how I would attach one to my round tank that they are in.