What to do if your Betta has an injdury or is sick? Here is some advice, but important! Put the Betta in a different tank! Aquarium salts etc can mess with your ecosystem!

This article from Fish Vet provides two simple steps to help a sick betta fish recover. The first step is to ensure the betta is in a suitable environment, including a 5-10 gallon tank with a heater and low flow filter. The second step is to provide proper nutrition, feeding the betta twice a day with an appropriate amount of food. The article also discusses common betta diseases and their causes, emphasizing the importance of good husbandry.