I have a 55 gallon tank that I'm planning on using as a sump for my 125 gallon tank. The issue is that I don't have a bottom brace. It has a top brace, but no bottom. As a sump the tank won't be filled more than 1/2 to 2/3. I don't know the tank make, and I can't find a brace locally. I was thinking about building a brace, or maybe even using duct tape. How necessary is the bottom brace? Suggestions?