I had one for 3 days and he made it out of the tank during the night. Really enjoyed watching him burrow and eat. I am in the process of making the tank secure. He had very little space to make it out but he found it. Has anyone seen how high they can jump?? I can secure area where he got out around 9" above water line. I would like to get another but don't want to lose it or be the cause of losing it. I have a spacelight therefore no glass cover. If I put my glass cover on my temp will skyrocket. He was my first loss and hope my only one. I have a 54gal corner unit and have a decorative top that covers 90% of the tank opening.