I was referring to the silicone the manufacture used to hold the frame to the glass. DO NOT remove the silicone that it between the glass.

WHen the tank was made, they started with a light layer of silicone between the glass to hold the glass together. In larger tanks, this is a special type of silicone. Next they will add other silicone to hold the top and bottom fram pcs to the glass. Last, they will add a additional beed of silicone to the insode seals of the tank to add extra sttrenght and ensure leak proof seams. I might be remembering the exact order incorrectly, but you get the idea here.

Don't worry

There are also a lot of videos on you-tube for this as well. Just incase I am not explaining all of this well enough