I am wanting to DIY a tank - 30" x 15" x 15" It is in fact for a mississippi map turtle and it only needs to be filled a third of the way so will the silicone be strong enough or will it need a brace? I am a bit wary of this :? where do you get glass from? and how much are glass cutters (decent but cheap). Can you reccomend any guides? I think that it is Matt who has a bit of expertise in this area? anyway all help is appreciated Aaron.