Frenchie, your tank looks beautiful. Trim it, don't trim it, whatever is appealing to you. If your worried about jumping fish, google "DIY screen cover for aquarium", I just made one for my reef tank using Bulk Reef Supply clear screening. I was worried about it taking away from the rimless look, but more worried about my fish jumping. It actually looks ok, you can still tell the tank is rimless. When the stupid aquasoil stops leeching ammonia on the 2 cubes I set up last month, I plan on making one for both of them.