Its very hard to sex a tort at this age likely not possible. Torts dont understand glass id put it in a table you will find its much happyr and a lot better for him. I wouldnt get another untill you can sex him but remember you need 3 females for each male as the male will harass the female and that will make her ill. Also 2 males will fight. I keep 12 torts and have a single male Horsefield and finding females that are healthy is not easy. Alison