We are a family-run business, super passionate about delivering the best. Specialising in unique premium quality garden, pond and home products, we believe you deserve the ultimate performance to suit your needs. That’s why we invest time and attention into adding powerful, naturally derived active ingredients that make for stronger, more effective solutions and happy customers.

Call us on 01246 240880

Common Fish Diseases

1st February

In our last blog, we spoke about some of the reasons fish jump out of water. One of the issues is due to diseases, which can cause the fish to jump out of the water to escape the pain.

Below we have listed some of the most common fish diseases along with their symptoms and how to treat them.

Common Diseases
How to Treat
Ammonia Poisoning
Red or inflamed gills

Fish could be jumping out of water to escape pain or inhale more oxygen

As mentioned in the previous post, high ammonia levels are easy to avoid by keeping your water levels right with Pond Equaliser. Unfortunately, there is no treatment for fish suffering with ammonia poisoning, other than leveling ammonia levels in water.
Fin Rot
Fish’s fins appear jagged and may have a milky substance around the edgesLike ammonia poisoning, Fin Rot is caused by incorrect water qualities. Above all, We would advise using Pond Equaliser and then monitoring the infected fish.
Camallanus Worms
Serious infections can be seen in the form of a pink/red worm protruding from the fish’s anus. They may also be lethargic and lose their appetiteA de-worming medication such as Levamisole is the recommended treatment.
White spot
White spots will be visible on your fish’s fins and possibly bodyThis is a very common disease and there are many remedies available at your local pet shop.
Hole In The Head
Quite literally, the fish will appear to have small holes or indentations on their head and may lose their appetiteA common method used to treat this disease is to add the antibiotic metronidazole into your water and then monitor water levels very closely. Furthermore, it is also thought that an improved diet (frozen fish food or vegetable based foods such as seaweed strips) can aid in the recovery of the fish.
Nitrite and Nitrate Poisoning
Symptoms are not obvious but they can include erratic swimming and loss of appetiteAlthough nitrate poisoning is not a disease, as we discussed in the last blog, it can be deadly to your fish. Ensure your water has low levels of nitrate by using Nitrate Klear.
Eyes are abnormally sticking out of the fish’s head and may appear cloudy in colourEnsure water quality is perfect to avoid infecting any other fish. Remove the infected fish and keep in quarantine whilst treating with antibiotics.
Swim Bladder Disease
Fish will be floating on their side or back and will be unable to diveThe easiest treatment is to not feed the effected fish for 24 hours. Swim bladder is caused by fish taking in too much air when eating.
Fish will have yellow or grey dusty spots on themCopper and quinine-based medications are very effective, but these can be toxic to certain fish so check before treating

Related posts

20th April

5 Edible Plants for Your Pond

Find out more
29th September

The Causes and Solutions to Red Pond Water

Find out more
24th February

What is pond salt?

Find out more

Share this page

About the author


Chief Executive Officer

If eating was an Olympic sport, Olly would hold the gold medal. He once fit 15 giant marshmallows in his mouth, consumes exactly 4,000 calories a day and even admits that 90% of his dreams involve food. At Envii, he specialises in all things e-commerce, spending time devising ways to improve sustainability and delivering exceptional service. All whilst eating, of course.

Notify of

Inline Feedbacks
View all comments