Not including the airline holes in each of the back corners of the top, there are 4 other holes. 1 is circular for the heater cord(s) and is 1 7/8". There is a long rectangular cut for a power filter at the rear center measuring 2 1/8" x 15". Finally, there are 2 rectangular cuts at the center of the top measuring 13"x7 1/8". I made 2 acrylic covers for these larger cutouts using the clear bottom of the plastic hood that came with the tank as a template. Using .220 thick acrylic from lowes, they cut 2 rectangles 14.5" x 8.75". I then had them cut 4 strips, 1"x 6.5". Using LocTite GO2 Glue, I cemented the strips to one side of the larger pieces to stop them from sliding across the tank when in place. I have my Marineland LED light (36-48") mounted over those.
answered 9 months ago
2out of 2found this answer helpful.