Why are my pond fish dying all of a sudden?

Why are my pond fish dying all of a sudden?

Acute systemic bacterial infection – fish die so rapidly that they don’t exhibit many physical symptoms. Pollutants can easily enter your pond and affect the water quality. For example, heavy rain can reduce the pH of the pond, whilst water run off from concrete around the pond could increase the pH to unsafe levels.

What would kill all the fish in a pond?

Severe fish kills occur when several contributory factors occur simultaneously. Prolonged cloudy weather, drought conditions, overcrowded fish populations, excessive algal or other plant growths, and high water temperatures are the most common factors that combine to cause fish kills.

What is eating my pond fish at night?

Raccoons, egrets, herons, cats, snakes, dogs, and even hawks or owls, have been known to catch koi and eat them. Here are a few helpful hints to figure out who your hunter is, so you keep your fish safe.

Should I remove dead fish from pond?

A dead fish should be removed from its tank immediately after you’ve found out about the incident. This is because when a fish dies it starts to decompose right away, which could foul the water in the aquarium. If the fish died from a disease, the corpse poses a health risk to the animals that consume it.

What could be cause of the fish kill?

The most common cause is reduced oxygen in the water, which in turn may be due to factors such as drought, algae bloom, overpopulation, or a sustained increase in water temperature. Infectious diseases and parasites can also lead to fish kill. Toxicity is a real but far less common cause of fish kill.

Do rats eat fish from garden ponds?

Rats. Rats are great swimmers, and ponds provide lots of feeding opportunities for them, including eating your fish food. They can predate on other animals, too — I’ve seen them taking baby ducks, so they may have a go at a sluggish fish.

How often should you change your pond water?

Try changing about 10% of your garden pond water once per week. Use water quality tests to monitor the health of your pond water, checking for pollutants. If there are water quality issues, try changing a little more water, maybe 15 – 20%. After a few weeks, you will find what works best for your pond.