Things You'll Need
- Aquarium salt
- Fin rot medication
Instructions
Change the water in your goldfish bowl or aquarium. Scrub down the sides to get rid of algae and other growths. A major water change improves the pH and other water quality factors in the goldfish's environment and gets rid of much of the bacteria that grows because of fish waste in the water.
Mix in 1 tbsp. aquarium salt for every 5 gallons of water before returning the fish to the bowl or aquarium. Stir the mixture until it dissolves. Aquarium salt eliminates many common bacteria from the water. Do not use table salt. Do not add any salt at all if you have live aquarium plants or fish that do not tolerate salt well, such as Corydoras catfish.
Add medication designed to remedy fin rot to the water. Consult your local aquarium store staff for advice and read labels carefully. Common fin rot medications include tetracycline, chloramphenicol and furance. Follow package directions exactly when adding the medication to the water.
Observe the infected goldfish closely for signs of improvement. Monitor the water quality and keep the fish bowl or aquarium water at a high standard of cleanliness at all times to prevent further fin rot infections.