I've had my firefish for almost a week now. Its doing very well too! Anyways, i've heard that these species are known to jump out of the tank. I have a 24gal nano cube and i often leave the lid up to keep temps down... Does anyone have any genus ways that i could leave the lid open and not risk the fish jumping out? I plan on eventually fixng the temp issue...don't know what i want to do about it yet though.