A couple weeks ago one of my firebellys died. I bought a new one last week and he is full of energy. A couple days ago he had escaped from my aquarium. I cleaned him off and put him back in it. The next day when I got home he was out again. I have 20 gallon long tank that has a wire screen top to it. There are no holes on the screen. I have no idea how he is getting out. I've even put a gallon of water on top of the cover and he still gets out. Has anybody had the same problem as me?