Red Worms in Pond Filters

Small, thin red worms are often found inside pond filters, usually stuck onto the filtration media.

Types

Healthy ponds usually contain red worms.Healthy ponds usually contain red worms.
These worms, called bloodworms, are a good sign that the pond water is healthy. Pond fish often eat these worms.

Red worms found in ponds are often called bloodworms because of their color. They are usually about 5 inches or shorter. They are usually the larvae of midges or the Chironomus species but can also be actual tiny worms from the Polychaeta family.

Significance

The bloodworms are sucked up by the pond filter's intake valve. The red worms are not small enough to go through the filtration media such as charcoal, zeolite or cotton fabric, according to "Freshwater Aquariums for Dummies."

Function

Bloodworms eat decaying plants, dead fish and any food that the pond fish missed. Too much decayed matter produces ammonia. In this way, bloodworms help to keep ammonia levels in the pond low.

About the Author

Rena Sherwood is a writer and Peter Gabriel fan who has lived in America and England. She has studied animals most of her life through direct observation and maintaining a personal library about pets. She has earned an associate degree in liberal arts from Delaware County Community College and a bachelor's degree in English from Millersville University.