While doing a waterchange on my 29g today I noticed that on the front left corner the silicon on the inside of the tank had multiple bubbles running down some were small about the side of a period and some were larger about 1cm in diameter. Is this something I should be concerned about as the tank is on a 2nd floor in a bedroom with carpeting. Im mostly worried about the tank breaking open at the corner or leaking. I have not noticed these bubbles before. Any ideas?