Considering buying a used tank that's been drilled for a sump twice. Once by the owner of the previous, previous owner, and again by the current owner. I know I could silicone a piece of glass, or acrylic over top of it, but, I'm trying to find a more "nicer looking" alternative than having to silicone a piece a glass/acrylic creating in my opinion an eye sore. I will be keeping one of the holes for an overflow if I do decide to buy the tank. Thanks -Justin