tank leaks

Hi, My tank is 15 months old and started leaking last week. The aquarium builder is building another tank as we speak but he originally used black silicone. The bottom front glass is leaking and has a 3 inch flat glass with silicone over it. I took pictures of the black silicone with what...

Front pane failure.. This is a long post but I think it may be helpful in preventing failures Let's talk about it. I recently purchased a 350 G2. I didn't care to do much research on it since I figured, all tanks with the exception of draining systems, weirs were created equal. After it was...