The fish tank viewing windows remind me of the cruise ship windows on the cruise ship the Carnival Pride. I even remember one night we had a 30 foot wave submerge our cabin window that was 30 feet above the ocean and turned into a fish tank.
If you have the room and materials to expand the fish tank I would go for it. In that those monsters make that giant tank look small.
Your tank holds 1,795.3 U.S. gallons, which is approximately 6,983.8 liters of water.