I just bought an orange and a cucumber for my fish. Do i just cut a slice and put it in or is there another step? I hear people say blanched cucumber, but I'm not sure what that means. At the pet store where I got my fish, they had an orange slice floating in the guppy tank and the guppies were going crazy for it. It appeared that they just dropped a slice in, but I wanted to make sure before I did it. Also, I was wondering if betta's or glass catfish would like the orange or cucumber?