Custom ClearView LidsChoose your lid style above, then choose your tank's length and width. Round up to the nearest foot. The longer dimension should be considered the length. Select the number of lid sections you want. Add any cutouts and feed doors you need then give us the particulars under the Add Customization Details tab. Include your exact INTERNAL dimensions in the tank dimension box. For Rimless tanks, this measurement is taken from INSIDE the glass. For glass