How Bad is this Silicon Blemish?

[Todd31]

Picture of a used tank waterbox tank for sale. Is that silicon issue in the “absolutely not” category ?

 

[Sump Crab]

I know I would never be comfortable with that

 

[vetteguy53081]

Picture of a used tank waterbox tank for sale. Is that silicon issue in the “absolutely not” category ?

While it should be fine, I would alcohol wipe the entire silicone and apply a liberal bead over it. Aqueon tank sealant comes in Black