Unfortunately, you have the victims to prove the importance of a lid / cover. Fish don't know that leap of faith will turn into a religious experience. If it isn't a jumper, it's the unsafe,toxic, nasty stuff that somehow manages to fly a perfect trajectory into ones tank.
75g Planted Barbs Denison, BlackRuby, Tiger, Albino Tiger, Green Tiger, Cherry, Gold, Checkered, Odessa.
NonBarbs Cardinal, Neon, RummyNose, Bloodfin Tetras, Z. Danios. 1RTS. Amano, Bamboo, Ghost & RCS. 20g Long Shrimp Tank RCS, Tiger, Amano.