Red Worms in Pond Filters

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Small, thin red worms are often found inside pond filters, usually stuck onto the filtration media. These worms, called bloodworms, are a good sign that the pond water is healthy. Pond fish often eat these worms.

Types

  • 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.

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References

  • Photo Credit Jordan Siemens/Digital Vision/Getty Images
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