Once your tank is set up and your fish are safely in their new home, keep them healthy and happy with the following tips:Spend a few minutes each day observing your fish. Look for any signs of illness, including blotches or rashes on the body, clamped fins, unusual movements, or swollen bellies.Only feed your fish once per day. Give them just enough food to consume within a few minutes.Vacuum the tank substrate at least twice per month. You want to remove waste and uneaten food.Scrape away algae from the inside of the tank as needed.Change around 25% of the tank water every couple weeks.Check the water temperature daily. Adjust the heater as needed.Test the water weekly. You want to be sure the aquarium water is within the parameters needed for optimal fish health.