I don't know. I guess it's possible if you have too much water in your tank. I didn't hear the conversation he had with the sales person from Glass Cages, but she was very adamant about advising him not to get rimless he said, though she also said for him not to get starphire glass either because "you probably are used to having the green tint of regular glass & won't like the starphire". Maybe she really didn't feel like taking an order/working today?