Ulcers in goldfish can be caused by a range of different diseases, but they are almost exclusively bacterial in nature.

The two most common types of bacterial goldfish ulcers are Aeronores and Pseudomonas. However, as the treatment of bacterial goldfish ulcers are the same regardless of the bacterial strain responsible, in this article we will simply refer to them as “ulcers" rather than drawing the distinction between different strains. [Read more…] about Goldfish and ulcers

Black smudge or black spot in goldfish is probably one of the most commonly seen goldfish health problems, and one that has many different potential causes.

Black spots or smudges are often indicative of disease or illness in the goldfish, and many goldfish will display blackening across part of the body or the fins and tails over a long period of time without the condition worsening greatly or appearing to have a massive impact upon the health of the goldfish.

However, black spots or smudges should not be considered normal and it is important to do what you can to tackle and treat the problem. [Read more…] about Black smudge (or black spot) in goldfish

Cotton mouth is not one of the most common afflictions of goldfish, but is one of the more serious ones and one that often gets wrongly diagnosed. It can lead to a wide variety of health problems in the goldfish, and should be dealt with as soon as it is spotted, as it is very contagious and can soon go on to affect all of the goldfish within your tank.

If you want to ensure that you will be able to diagnose and treat cotton mouth if your spot it, read on to learn more. [Read more…] about Cotton mouth in goldfish

“Flukes" in goldfish doesn’t refer to an actual disease, but rather a parasite, which comes in two different varieties depending on whether it affects the body or the gills of the fish. Flukes are one of the most common types of aquarium and pond parasites, and one of the largest too, which can be seen with a very low magnification but still, not with the naked eye.

While there are two different types of fluke parasite- gill flukes and body flukes- treating them and eradicating them is undertaken in the same way. [Read more…] about Goldfish and flukes

The condition of “velvet" in goldfish might sound rather prettily named, but in reality it is anything but! Velvet, or to give it its correct name, “Oodinium," can soon take over a whole tank of fish, and have a significant effect on the health and wellbeing of your goldfish within a short space of time.

Read on to learn more about velvet, how it is caused, and what to do about it. [Read more…] about Goldfish and velvet