30 gallon Oceanic Cube.
Marineland c-160 filter
105w PC light
ADA Amazonian 2 substrate
ADA Sarawak Sand
Keep up with water changes and siphon out all die off to prevent algae.
Rotala sp mini type 1 and 2
Rotala sp Green
When you see signs of stress in your fish, you can then take steps to identify the source of that stress and then to resolve it before it becomes a major issue.
If you're looking for a unique way to stock your new tank, give freshwater shrimp a try.
If your fish is suffering, you may want to consider euthanasia as an option to humanely end his pain.