I own a 28 gal JBJ nano, the tank is currently not in use. I would like to remove the rim from the top of the tank (I won't be using the hood when I set it up again). Has anyone done this and if so how?
No! You will take away from the integrity of the tank. The rear chambers are siliconed to the 3 sided glass. The rim both upper and lower help keep the 2 parts together. By removing the upper you are relying on only the silicone to hold the tank together.