Is this normal? or is this a leak?

[Arkiluth]

Just got my Alphacool Block and noticed this.

Is this a leak and how do I get this replaced if it is?

 

[Arkiluth]

Hello, Can I get a response please? Thank you.

 

[Eddy]

Nothing is leaking. That’s just dust.
How or why it got there—I really couldn’t tell you.