what would you do ?

[kien]

That's some bad luck :-(

You've already paid for the tank so now you are out of pocket unfortunately. It is more unfortunate that the LFS isn't willing to make it right. I'd probably just do what Grizz suggested. Although I dont have much of a confrontational personality. I'm really curious as to what store sold you a tank with bad siliconing, incorrect densions AND a misplaced overflow tho. No need to drop names here a PM will do :-)