LOL I have decided that I am gonna mod my 55 gallon fish tank this summer. The plan is to remove all the glass panels, and build a plywood L-shaped tank with them. It will end up being a 9'x1'x21" tank, but with a 90 degree bend in the middle, so it can fit into a corner. The total capacity should be about 110 gallons.
Here are some very basic sketches of how it will be built.
I am going to use permadri pond coat to seal the plywood, with Dow 795 silicone on all the joints. Also built will be a custom stand, and a sump which will be made out of one of my old tanks, most likely the 29g. Total cost for the build should come to about $250-300.
Since this is a mod, I think I put it in the correct section. there is nothing specifying that it has to be a computer-related mod.