Yeah, I understand about the language barrier part and how it will be difficult to tell them exactly what you want so I am designing everything in AutoCAD which is nice to be able to make a complete drawing that is accurate with the dimensions and all but simple enough for anyone to understand. Even the external overflow I want on it will be easy to understand since all they have to do is cut out the pieces to the dimensions I drew. Basically I plan to send whoever makes my tank a complete set of drawings just like you would have on a house only not as many pages. My plan is to go for a room divider with both sides and one end viewable. This will be a challenge to build but with a CAD program it is so much easier and more accurate.