I’m working on my used Red Sea tank and i wanted to silicone the edges of the sump just in case it had any leaks, which I’m sure there weren’t. But I wanted to do it for safety. Can I just add a thick bead of silicone ontop of the existing beads in the corners? This is what the tank looks like. I was going to add a thick bead so it would just cover the existing one completely and adhere to the glass around it. Would that be fine?