I have read several posts about using "aquarium safe" silicone for projects like building a basking area. I went to Lowe's and couldn't find any that said "aquarium safe". They had dozens of silicone type adhesives... Where do you find it, or is any of that stuff ok?
I got mine at petco. You can get it at any petstore with much aquarium business. It's called aquarium silicon and you can use it to re-seal a leaky aquarium. Some of the silicon you get at the hardware store will be toxic, so just be sure if that's where you get it that the package says it's for aquariums.