hey i have a tank set up with a glass divider held in place with silicone however one of the fish is small enough to fit though the gap at the front as the tank is bow shaped... any ideas as to how to fill it?
Acrylic sheets. Cut em' up and fit them accordingly to the size of your gap. Just get an appropriate cutter. You can get the acrylic in a hardware store, and they don't cost much either...