What is angelfish fin rot?

In this post, we will answer the question “What is angelfish fin rot?”. We will also discuss the reasons for angelfish getting their fins rotten and how to treat it.  

What is angelfish fin rot?

An illness that begins on the edge of your angelfish fins and progresses towards the body of your pet is described by the term “active disease on your angelfish.” Depending on where it has progressed on the body, it will be referred to as advanced fin decay or body rot, respectively. 

These organisms will be discussed in greater depth later, but it is important to know that they may occur in the wild. If you keep Angelfish in a tank with poor water quality, you will experience fin rot more frequently. Poor water quality allows these bacteria to grow in a tank full of Angelfish.

What does fin rot look like in angelfish?

If you suspect fin rot in an Angelfish in your tank, you’ll need to know what to look for (and what not to look for) in terms of looks to be on the safe side. 

The tips on the extremities of your Angelfish are particularly vulnerable to injury, and a new cut is not always indicative of fin rot in this species. It is common for the injured region to look milky in appearance, which is an indication of fin rot caused by bacterial infections. In time, the damage will move up the fin, leaving an even edge and a milky look as it progresses. 

Damage that seems more ragged on your Angelfish might suggest fin rot, which is caused by a fungal infection in the fins. Angelfish fin rot can also appear as a red, pink, or white patch covering the affected part of the fish’s fin. 

Finally, if left untreated, sick fish might develop fin rot on the body of the fish. In the advanced stages of the disease, your Angelfish may not be able to recover from the wounds it has sustained.

Causes of fin rot on angelfish

Once you have a better grasp of Angelfish fin rot, you may question what causes the infections to begin with. Here is some information to help you find out. Fin rot on the ends of your Angelfish can be caused by a variety of factors, including: 

• Harm to the fins — Other fish or things in the fish tank might cause damage to the huge fins of your Angelfish. Bacteria and fungi can infiltrate the fin’s underlying tissues because of these wounds. 

The presence of bacteria and fungi in contaminated water encourages the development of bacteria and fungus. The ability to maintain a healthy water column reduces the likelihood of various illnesses, including Angelfish fin rot. 

• Angelfish with weakened immune systems — An Angelfish suffering from another ailment may find it difficult to fight against fin rot. Because of the infection, your pet may become weakened and more susceptible to infection from another source. 

• In stressed fish, rot can occur on the fins. Fish die as a result of stress. You must manage the water parameters, correct food, tank populations, and the aesthetic of the aquarium. Angelfish are Cichlids, however, they are calm and placid creatures (house them with peaceful tankmates and offer hiding spaces).

Fin rot or nipping?

To be clear, we believe it is critical to emphasise that species with long and delicate ends, such as Angelfish and other exotic tropical fish, might be prey for other fish in the tank. Because of the restricted area in your aquarium, your pets will come into conflict with other aquarium inhabitants as they stake their territory or urge tankmates to leave them alone. 

Keep an eye on your Angelfish to observe if any other fish are nibbling at its fins. Remove aggressive tankmates if nipping persists, since this will stop the assaults and avoid the wounds from becoming infected with fin rot.

Can angelfish recover from fin rot?

Angelfish fin rot is not always lethal, especially if it is detected and treated promptly. If the sickness has progressed to an advanced stage, it may be more difficult for your affected fish to recover. Prevention is always preferable to cure (although you will need more than an apple a day to keep the vet away). 

Fin rot causes tissue injury. Minor damage can be repaired by your pet, but if the damage on the fin has reached the bodily tissues, it is not possible to restore it. Advanced body rot is frequently lethal, as the diseased fish has already sustained damage to essential skin and muscle tissue by that point in time.

How to treat fin rot in angelfish?

– Water temperature should be checked. 

– Water should be changed. Water quality should be tested. 

– Consider quarantine.

– Antibiotics and antifungal therapies should be considered. 

– Salt treatments for aquariums

Your Angelfish should be kept at temperatures ranging from 77 to 83 degrees Fahrenheit. In colder temperatures, tropical fish are more susceptible to illnesses such as fin rot, which can be fatal. Changing the temperature of the water might be a straightforward solution. 

Damage to the pectoral fins of angelfish caused by illnesses such as fin rot will necessitate a water change. Change up to 50% of the aquarium’s volume to aid in the removal of bacteria and fungus from the tank. Make sure to clean all of your decorations as well as your filters and the substrate. 

The specifications of your pet’s water supply are crucial to his or her health. Check the hardness, nitrates, nitrites, and pH levels in your water by doing a water test. Any difficulties with water quality should be addressed to foster a better environment for your Angelfish to recuperate. 

If you just have one or two diseased fish, you should consider relocating them to a quarantine tank until the infection has subsided. As a result, you will be able to maintain your other tankmates’ healthy while also treating the fin rot of the sick fish. 

Medicines will be used to cure the fin rot and speed up the healing process. These antibiotics and antifungal medications can also be used to treat a variety of other disorders. 

Aquarium salt is another medication that is often used (for freshwater tanks, not saltwater). The standard ratio is one tablespoon per three gallons of water. Instead of immediately adding aquarium salt to your tank, we recommend dissolving the salt in a cup of aquarium water and putting the solution into your aquarium.

Angelfish fin rot: bacterial or fungal?

Angelfish fin rot can be caused by either bacterial or fungal growth in the water column, resulting in the death of the fish. Fin rot can occur as a result of a mix of bacterial and fungal diseases occurring at the same time. 

Fin rot occurs naturally, however it is discovered significantly more common in the hobby of fishkeeping than in the general population. Pseudomonas fluorescens is the name of the bacteria that causes fin rot to develop. It may survive either in the soil or in the water. Rather than using oxygen for cellular respiration, the water strain of bacteria uses nitrate as an alternative fuel source. 

Occasionally, angelfish fin rot is accompanied by fungal diseases in addition to the rot. The fungal damage spreads more quickly than the bacterial causes, resulting in even borders with a milky look on the surface. 

These microbes are nourished by poor water quality. Fin rot can be infectious as well because the bacteria and fungus spread through the water column as the fish die.

How to prevent angelfish fin rot?

Angelfish fin rot is preventable if you take the proper precautions. The following are some measures you may do to keep Angelfish’s fins from rotting in your aquarium:

·      Inspect new tankmates

·      Clean your water column

·      Keep peaceful fish

·      Quarantine sick Angelfish

Fin rot should not be introduced into your fish tank. Before purchasing or introducing Angelfish into your aquarium, make sure they are in good health. 

Water quality should be monitored, and water changes should be performed regularly. Bacterium and fungus will have a difficult time reproducing in a clean water column. 

A tranquil tank is a healthy tank, and this is especially true for Angelfish tanks. Fin rot is common in wounds, so keep your Angelfish away from crowded or aggressive tank mates to avoid this problem. 

Last but not least, unhealthy fish should be removed from your communal tank. Fin rot has the potential to spread, but isolating diseased fish can help to avoid it.


In this post, we answered the question “What is angelfish fin rot?”. We also discussed the reasons for angelfish getting their fins rot and how to treat it.  

If you have any thoughts or doubts, feel free to drop us a comment below!

Frequently Asked Questions (FAQs): What is angelfish fin rot?

Is angelfish fin rot a painful condition? 

Pain is something that all fish, even Angelfish, can experience. If left untreated, diseases such as fin rot can cause tissue damage and even death. We may not be able to comprehend the extent of your pet’s suffering, but we believe he or she is aware of it. 

Is fin rot infectious to humans? 

Fin rot is not one of the illnesses that may be transmitted from humans who handle fish or the water in which they are swimming. 

What is the rarest type of angelfish? 

The Clown Angelfish is one of the more unusual breeds of Angelfish, and it may be difficult to locate one without putting up substantial effort on your part. These fish have a complicated pattern that runs over their entire body, resulting in spots that are different in size and form from one another. Clown Angelfish are more tranquil than many other varieties of angelfish, and they are also rather simple to keep. 

Is fin rot infectious amongst other types of aquarium fish? 

The first and most important thing to consider is removing the sick fish from the tank population since fin rot is an infectious illness that is not commonly seen in aquarium fish. As a result of this action, you will be able to heal diseased fish more efficiently, and the approach you use to avoid disease will not harm any of the other fish in the communal aquarium. 

Is Melafix an effective treatment for fin rot? 

Infections caused by bacteria, such as fin and tail rot, eye cloud, pop eye, body slime and mouth fungus, can be treated with API MELAFIX cure fish. As a general rule, all API fish therapies may be used in combination with one another without causing harm, as long as you can follow the guidelines for both medications during therapy. 

Which angelfish do you think is the most beautiful? 

The black lace variety of the silver or zebra angelfish is characterised by the presence of additional black genes. It is often regarded as one of the most aesthetically pleasing of all the angelfish. The lace angelfish was developed for the first time in the 1950s.


ANGELFISH FIN ROT. https://cichlidguide.com/angelfish-fin-rot-treatment-guide/

How to Treat Fin Rot in Angelfish. https://aboutangelfish.com/how-to-treat-fin-rot-in-angelfish