Things You'll Need
Instructions
Measure the top of the aquarium with a measuring tape. Add 1 inch to the length and width measurements and write the final figures down on a piece of paper.
Saw a rectangular piece of plywood in the length and width you just calculated. Name this "Piece 1" with a pencil.
Saw two pieces of plywood with the same length as the shortest side on Piece 1 and a width of 4 inches. Name these "Piece 2" and Piece 3" with a pencil.
Saw another two pieces of plywood with the same length as the longest side on Piece 1 and a width of 4 inches. Name these "Piece 4" and "Piece 5" with a pencil.
Sandpaper the edges on each piece of wood. Paint each piece of wood liberally with a waterproof sealant.
Form a three-dimensional box out of the pieces by balancing Piece 1 on top of Pieces 2, 3, 4 and 5.
Hammer a nail into each corner of Piece 1 to attach it securely to the other pieces of wood.
Turn the aquarium cover over. Paint the inside of the cover with white paint. This will act as to reduce light reflection.
Leave the paint to dry overnight.