Mine was hanging around like that for a while. Soon after it died. :( I'm not sure about the white stuff. I'm sure there are many websites that could tell you about that. You probably should just continue to feed it what you usually do.
I'm painting my room and the colors are going to be a bright pink and a bright blue and I was wondering if anyone had any cool ideas for like a design I could do Thank you! Oh and I'm a teen by the way so I want it to kinda pop! lol Thanks!