He is very cute. Love the name too. However, as Yvonne said, the tine bowl with the plastic Palm tree is nothing but a death trap for Jack.
Jack needs a proper aquarium, with good filtration, heater, basking dock or log to get out of the water and a basking uvb light over the dock/log to warm up over 80-85 degrees so he can properly digest his food.
The changes don't quickly will keep Jack happy and much healthier