60*24*18 freshwater tank with 3 internal power filter and 1 UV Sterilizer with remote DSB.
Keep changing at least 25% water every week. This is a must. Sometimes you may need to change more water depending upon your Nitrate level.
Its my hobby to keep fishes from my early childhood. Planning to get 1500 Gal. tank in about 6 months time.
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.