Trying to figure out what would be the cheapest/easiest method for an in tank sump Idea I have. I'll attach a paint document I made describing it. I called a glass shop to inquire about having a sheet of glass cut so I could silicone the divider in the tank, and it turns out it is impractical and expensive. Any ideas for a material I could cut into the correct shape and still silicone to the tank to prevent water flowing in between? I'm thinking home depot might have plastic board, but I don't think silicone would bond to it. I'm terrible at diy projects, so any help is appreciated
