My 40g breeder's silicone after 10 plus years of use started showing signs of silicone separating from the glass in many spots and I knew sooner or later it was going to be trouble. I went and purchased a new one from Petco, not the dollar a gallon sale but I was able to get one for around $85. Now to the old tank, I keep reading and watching YouTube videos on re-sealing a tank, they all show and mention step by step the removing of the old outer silicone and re-sealing. My question is what about the old silicone between the panels? Is this asking for trouble and is it even worth doing the job?