Tank is 33 gallons. Square shape tank, got it from a friend. Running currently with: Aqua H2O hang on filter, Via-Aqua 300w adjustable heater, 9w blue Submergable light, 2 Oxygen stones
New to this myself, I have however found that you have to study up on which fish can share a tank before buying.
Fake plants, sea shells, rock structures.
I like fish!!!!!!
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.