Marineland 28 gallon bowfront tank, Penguin Biowheel 150 filter, 100 watt Aquatic Garden heater, Whisper 40 air pump with a ten inch bubble bar.
Keep the water clean, change 20% weekly, don't overfeed.
Red Wag Swordtails, four Mickey Mouse Swordtails, two Calico Fantails, half a dozen Zebra Danios (including the biggest, fattest one you've ever seen!) and one medium Plecostomus.
Mixture of live and fake plants
I'm fairly new at this. I got a 10 gallon aquarium up and running for six months last year before moving up to this one after Christmas. The Calicos, Pleco, and some of the Danios are from the original batch, the Swords are new.
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.