I’m really hoping this doesn’t become an issue. My first Aqueon 210g started failing a few weeks after install so I may just be overly paranoid, but this one has been set up for a few months now and I just noticed this. It’s in the bottom front corner. I know for a fact it wasn’t like this at setup. It appears to not be at the actual structural seam and just one the overlap area but it’s still a bit concerning to me after my last experience.