White stuff on tortoise shell?

[Zay001]

I just noticed some white stuff on the shell of my 1 year old hermaan tortoise.

Is this something I should be worried about? (pictures below)

 

[Tom]

Looks like hard water stains or some calcium dust leftovers.

Nothing to worry about if its one of those.

 

[Nicholas999]

My hermans has the same thing I was worried about but it's just the shell growing your probaby notice it more the bigger they get