Hi, I'm new to post but I am currently working on a 16g MetaFrame project. The frame is in AMAZING condition but the glass, though intact, had scratches, so if I am going to the trouble to replace the silicone, I'm replacing that glass. I chose Starphire glass for the front and side viewing panels. I also went with a glass bottom on top of the slate bottom since silicone doesn't bond with slate (for very long anyway). We are at the stage of siliconing all the new panels of glass (all remnants of tar and silicone have been removed). I'm currently waiting on the delivery of black silicone (I thought it would make the tank look more authentic to the original tar-sealed version). I'll post pictures as soon as the new glass is in place.