How to Treat Fungus and Bacteria in Aquariums

Do you want the best environment for your fish? Do you know you will have to get rid of fungus and bacteria to better your aquatic environment? Do you know how to treat them? You will learn how to treat fungus and bacteria in this article.

You can remove Fungi and bacteria with effective treatments like metronidazole, praziquantel, levamisole, and several other treatments to get rid of bacteria and fungi in the tank.

How Do You Get Rid of Fish Aquarium Fungus?

There are several ways you can get rid of the fungus in your aquarium. The fungus can be detrimental to your fish and aquarium’s health, so you have to remove them from your tank as soon as you can. The most common way to get rid of the fungus in your fish aquarium is to use medications or antibiotics in the aquarium.

Another effective way is to maintain proper water quality. Once your water is of high quality, there will not be a conducive environment for fungus to thrive. You have to perform regular water changes and keep clean water.

You might not also need to test for water irregularities and treat them accordingly. You can also add formaldehyde to your tank to get rid of the fungus. You will have to add a controlled amount as excess formaldehyde can affect your fish.

Sea salts will also be a good option to get rid of the fungus in your aquarium. You can add a tablespoon of sea salt per gallon of aquarium water to help eliminate the fungus. You can do this as much as you see the need for it.

The aquarium salt should not be too much as a regular dosage will kill the fungus, but excess use will affect your fish. You can also use potassium permanganate to get rid of some stubborn fungus in your aquarium. You can get the substance from your local pet store and use it to treat the fungus in your tank.

Potassium permanganate can burn your fish skin and also fatally burn your fish’s skin and gills. It can also affect your plant and destroy biological filtration. You have to remove your plants and fish from the aquarium before applying the potassium permanganate.

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How Do You Treat a Bacterial Infection in a Fish Tank?

You can treat bacterial infections in a fish by using antibiotics. Antibiotics like erythromycin or nitrofurazone will help get rid of every bacterial infection in your fish tank. You can also use praziquantel, metronidazole, and levamisole to treat every bacterial infection in the tank.

Using antibiotics can disrupt your tank’s biological filter, so you have to be careful when using them. When using the medications, you might need to remove carbon and other chemical media from your filter. Having these chemicals in your filter will absorb the medications and reduce the efficiency.

You can also put an aerator in the tank to increase the potency of the medication. Using formalin or formaldehyde will also help treat bacterial infections in your fish tank. You will need to use the formalin in a controlled quantity as excess use can cause your fish to develop health issues.

Excess use of formaldehyde can also affect your aquarium plants. You have to make use of the required quantity to ensure the good condition of your tank and its inhabitants. If you feel the liquid concentration is too much, you can dilute it before applying it to your fish tank.

You can also use sea salts to treat bacterial infections in your fish tank. You will need to add a tablespoon of sea salt to a gallon of your aquarium water to treat the infection adequately. If you have larger tanks, you will need to add more tablespoons of sea salts to your aquarium water.

You need to know the specific bacterial infection in your tank to be able to treat it well. Although there are general treatments for bacterial infections, you should treat them with its specific treatment.

What Does a Fungal Infection Look Like in An Aquarium?

Fungal infections in an aquarium are easy to recognize as you will see white cottony growths on your fish. Although fungal infections are not as common as bacterial infections, you can easily recognize them by their white furry growths.

You will mostly see this growth on your fish’s body and rarely in its internal organs. Water quality is the major cause of fungi infections in the aquarium. If your water is of low quality, you might have problems with fungus.

You need to make sure your water quality is top-notch to control and avoid fungal infection in your tank. You can also notice swelling and blisters on your fish’s skin. Gray and white patches will also start to appear on your fish’s gills and gill cover.

Fungal infections can give rise to several other infections in your fish. It would be best if you got rid of them as soon as you can. You can use antifungal medications to help get rid of the infections. The sooner you remove them, the better it is for your fish and aquarium habitat.

How Do You Treat Fungal Infection in Fish?

There are several ways you can treat fungal infections in your fish. Before you start your treatment, you need to clean the tank and remove every chemical filtration. Chemical filtration will absorb your medications and cause their reduced efficiency.

After cleaning the tank, get an antifungal medication to treat the fungal infections. You have to follow the manufacturer’s direction to ensure you use it properly. You can repeat it every day until you are sure your fish is free from the infection.

You can also make use of sea salt to get rid of fungal infections in your fish. You can also use normal salt, aquarium salt, rock salt, etc., to help treat your fish of its fungus. You also have to provide good water quality for your fish to help them with their troubles.


You can treat fungus and bacteria in your aquarium tank by using antibiotics and fungal medications. Treating your fish tank of fungus and bacteria is necessary, so you need to ensure you get rid of them from your tank. You can also use salts to get rid of the fungus in your aquarium.

John Brandon

John has kept fish all his life (since he was about 5). He started with keeping guppies and fell in love with fish keeping almost straight away. That was 40 odd years ago. These days John still keeps fish and currently has two large tanks where he keeps many different types of fish such as Angelfish, Neon Tetras, Goldfish, Guppies and many more.