Last week I saw a 250g aquarium for sale ( DAS H39) and it had a leak. Got it real cheap and figured I could reseal it. Today I cleaned it all out but I think the aquarium floor has 2 layers of glass. The top layer is 3 pieces silicone together and I believe the other is one piece. I can see moisture droplets between the glass and there's no way to access the bottom as it has a wooden floor as well. My concern is if there's moisture in-between the glass bottoms. Will that in some way keep the new silicone from adhering to the glass when applied.