Help! Scratch or crack?!?

[subzero]

32 gal biocube - passed 24hr leak test. As I was drying it I came across this little scratch/crack?
It’s only on the inside, and it feels like and looks like a scratch. It’s not going through the width of the glass. Also, i think that it has some black material and I scratched it off and it left this white line... I’m thinking it may have been the black silicone. Maybe scratch during construction?

If it’s a crack should I exchange the biocube?

I don’t mind the small scratch if it’s just a scratch.

 

[Saltyreef]

I vote scratch

 

[F i s h y]

Looks like a scratch and may not be visible once the tank is filled unless algae grows in it.