His belly looks pink in the photos. Is he coming up on a shed?
Your attitude pretty much turns off many people that would want to help.
First, your using a bowed front enclosure for fish. While good for fish, isn't optimal for a ground dwelling snake. It has a lot of air space, and little floor space.
The open space, the open 3 sides and minimal hiding spots will put your snake under tremendous stress.
The height can prove to be harmful if your snake falls from the top of the enclosure. Broken ribs, internal injury and death all come to mind.
It's just not an optimal set up for a terrestrial snake.
Second, you have the heat lamp inside the enclosure. This is a serious burn risk, especially more so when the snake can clearly get on the lamp. There are burn pictures all over the forum of snakes that wrapped around the heat lamp, with serious burns.
Third, you are missing key equipment.
A UTH and rheo/thermostat. It will give your snakes belly heat, aiding in digestion and also providing proper temps at the ground level for your tropical snake.
The tank is also missing thermometers to measure the temps. It is very essential to KNOW your temps and not GUESS!
Hygrometers, you dont know the humidity in the tank.
2 identical hides to promote thermoregulation without stress. Providing a hot hide and cool hide will ensure that your snake can remain hidden and still stay at the best temps.
Other than the very tall enclosure, I have to say that closing off 3 sides of the tank with paper or decorative poster will help your snake de-stress.
I too have to advise a different enclosure. One that has a lot more floor space and less air space. Fish tanks are for fish.
Besides the increased floor space, the lower the enclosure, the easier it is to maintain proper temps and humidity.