Problem with RedSea tank?

[BertieBones]

I have noticed this appear on my tank between the seals and the glass, should I be concerned ?

 

[Reeferstin]

I have noticed this appear on my tank between the seals and the glass, should I be concerned ?

No you do not need to be concerned at all

 

[ZsReef]

I'd give Red Sea a call just to check. How old is the tank?

 

[bsr2430]

That looks like on the outside edge, many things could’ve just hit it. Or even in shipping.
I have the 425xl and had an issue with a return line, fixed and no issue. When you call, they will help you with anything!