While looking around craig's list, I found a glass tank that would be perfect for my young bp in need of an upgrade, there is just one problem I can see in the photo. It has the top in three parts, two screens and a glass strip in the middle, well it looks like there may be a crack in the glass. If this is true, can the crack just be fixed with some silicone sealant, or would the whole piece need to be replaced?

The other question I have has to do with cats. The room the enclosure will be in will be one of the main rooms of the house, so the cats will have access to the tanks, and I don't want them to be able to get to the screen and break potentially break it and have access to the snake. Would a piece of plywood across the top remedy this fear and protect the screens?

Thank you for any replies.