Discus can jump when frightened easily. Make sure there is not plenty of open space nor glaring lights. They are by nature rather timid and will feel more secured if they have enough hiding places as well as subdued lighting conditions.tedcb5600;3786467; said:I'm ready to jump into the discus game, but I have a question. Will discus jump out of a tank? I'm setting up 135g and wanted to leave the tops off so I can put terrestrial plants around the back with roots extending into the water.
You may leave the tank open-topped if you are confident your setup makes your discus feel comfortable enough to get accustomed to.