I went to one of the big box stores looking for silicone that stated it was safe for aquariums but could not find any, I know not to use any with a mildewicide etc. Where do you get it? What product do you all use?
You can get aquarium grade silcone at Home Depot. It is made by DAP. You will not find it in the caulking section, but look by the Gorilla Glue and rubber cement in the paint section.