13 foot "L" shaped tank

[wheatgerm]

so i want a really long tank but i also want to be able to build it out side and test out side before i bring it in the house.. so i have com up with building a tank like a "L" one side will have a 6 foot glass window and the other side will have a 5 foot window, the tank will be 24inc tall and 24inch long.. has anyone built a tank like this? im looking for a link to give me a good idea how to make the 90degree angle strong enough right into the corner and also how to get the 2 pieces of glass as close as possible where they meet in the center