There’s no need to freak out when your cory catfish has white fungus. However, don’t underestimate these symptoms since your catfish may be suffering from some serious diseases.
So, what are the causes of white fungus in cory catfish? How to treat this disease and restore your cory catfish’s health? I will discuss this symptom in detail and provide you with helpful solutions. Keep reading to find out!
Why Does Cory Catfish Have White Fungi?
If your cory catfish has white fungi, it may suffer from cotton wool or Columnaris disease. However, you have to assess the symptoms carefully to decide if it’s a fungal disease or a parasitic infection in fish.
Many diseases can cause white fungus in fish. Therefore, you have to observe the fish’s behaviors and symptoms more clearly to identify the right cause and develop proper treatments.
The chance of parasitic infection is higher than fungal disease, especially for cory catfish. Here are some basic symptoms and signs of these diseases.
Cotton Wool Or Columnaris Disease
The cotton wool or Columnaris disease features fairly similar traits to a bacterial infection, leading to the regular misunderstanding between them.
The main cause of this disease is a bacteria called “Flavobacterium Columnare.”
Common signs
This bacteria targets the cory catfish with a weak immune system. It features a column or rod shape and commonly causes small lesions in the fish mount.
If cory catfish have off-colored skins or fuzzy patches on their body, the risk of cotton wool disease is very high. The color can range from white to orange and mild yellow.
When the infection gets more severe, it will damage the fish skin and reveal the underneath muscles. At one point, this disease can completely destroy the cory catfish’s fins and scales.
The cotton wool or Columnaris disease is highly fatal and hard to treat. There’s a very small chance your cory catfish can recover, but you have to treat it at the early stages.
White Spot Or Ich Disease (Parasitic)
Ich disease is less fatal than Columnaris disease, and it can lead to the white fungus in cory catfish. The most common cause of Ich disease is the small spots on the fins and bodies.
When the disease gets more severe, your fish will get itchy and become very uncomfortable. They will rub against the other objects and side tanks, plus the loss of craving for food and appetition.
Fungal Disease
The fungal disease is commonly caused by bacteria like Achlya, Fusarium, and Saprolegnia. If you have ruled out the possibility of parasitic diseases, a true fungal infection is very likely.
The typical sign of a fungal disease is the gray and white spots on the catfish’s skins. It would be best if you looked for the small bumps and fur on the fish’s gills, which are another common sign of fungal infection.
How To Know Whether It Is A Columnaris Disease Or Fungal Infection?
When a fish gets infected by fungus, it will show a white fungus that looks like bread molds. The color of the infected spots is usually gray or white.
Meanwhile, the Columnaris disease caused by bacteria will flatten the fish’s patches and slowly make them fuzzy. Besides the white color, the infection can become orange and yellow when it gets more severe.
How To Deal With Fungal Infections?
Before choosing the proper treatments, you should test the water pH and quality using a water parameter. If the water conditions are not fine, you should make the necessary adjustments regarding the temperature and cleanliness.
For the cory catfish that carry white fungus, you should isolate them in another clean tank. It will prevent the infection from infecting the other fish in your tank and prevent sick individuals from getting bullied.
The ideal water temperature for sick cory catfish is 24°C (75°F), which can slow down the spreading of white fungus. Then, feed your catfish the right medicines and provide them with a nutritious diet to facilitate recovery.
FAQs
The information provided below will give you more insights into the white fungus disease and infection in cory catfish. Keep reading to discover more!
Is White Fungus Dangerous To Fish?
If your fish carry white fungus, they may suffer from poor water quality or serious infections. You should carefully check your fish’s health and living conditions when spotting white fungus in the aquarium tank.
What Species Eat White Fungus In An Aquarium Tank?
There are various underwater species that eat white fungi, such as snails, fish, and shrimps. To make your tank cleaner, you should look for fish and Nerite snails that can eat white fungus and dead organic matter.
Can Salt Treat Fish Fungus?
Yes, adding sea salt to the aquarium tank is one of the most effective ways to treat fungus infection. However, the cory catfish cannot tolerate salty water, so you should look for other alternative treatments.
How Long Does It Take For Fish Fungus To Fade Away?
If you leave the fish fungus untreated, it will gradually get more severe and negatively affect your fish’s health. Therefore, you need to add non-iodized rock salt to the tank and cure the fungus.
The fish fungus will go away in seven days, depending on the state of the infection. Meanwhile, the symptoms will decrease and soothe after a few days.
Can Snails Eat White Algae?
Raising Nerite Snails can help eliminate white algae in your tank since this snail can eat virtually all algae. Besides Nerite snails, there are many species that eat white algae, such as Barbs, Danios, American Flagship, or Mollies.
Final Thoughts
The common causes of white fungus in cory catfish are cotton wool or Columnaris disease, fungus infection, and sometimes Inch disease. These infections will make your cory catfish carry the white fungus.
Spotting the right cause and choosing the proper medical methods is vital for your cory catfish’s survival. You should observe the fish’s behaviors and symptoms carefully to cure it.
I hope the information provided can help you understand why cory catfish has white fungus. Thank you for reading!
