Bought this tank 2nd and only today ( tanks been running for 2 weeks now) I’ve noticed this at the back right corner this part of the glass on the corner that looks like it’s been siliconed. Now I’m not sure if they come like that( don’t imagine so) and seal does not seem to be damaged or no chips or anything like it. Just checking with more experienced reefers if it is a worry as I’ve read some stories about Red Sea thanks. Thanks for you time lads.