I can see the photos you just posted.
Can you answer the following questions
- is the tank cycled - how did you cycle it?
- does the tank have a filter?
- does it have a heater - what temp is it set to?
- how much water do you change and how often?
- what water conditioner do you use?
- apart from the fish what else is in the tank - fake plants, live plants etc?
- What do you feed him?
- How much and how often do you feed him?
