The quote was from Xenia Glass, I considered getting the glass at lowes but all they carry is picture frame glass (1/8"). I've heard it will work but you have to be real careful about bumping it and if going to do it, I better do it right. It's too bad lowes doesn't carry thicker than 1/8" because they have the 10"x12" for two dollars and some change a piece. The quote I got from Xenia Glass was for three pieces all measuring 10"x12" but a member suggested I may want to make the middle divider go up the tank further if that makes any sense. That way my skimmer doesn't shoot over the first bubble trap. So back to the silicone should I just use the GE silicone from Lowes or order the silicone made for aquariums? The aquarium silicone says it takes 72 hours to dry I would rather wait 24 hours.