Worms Clogging a Fountain Head in a Fish‑Free Pond: Identification and Solutions

Identify the “Worms”

• Large, pink = earthworms fallen in. Raise pond lip above ground.
• Small, thread‑like = insect larvae (midge, mosquito).

Non‑Toxic Controls

• Enlarge fountain‑head openings to pass debris.
• Add mosquito dunks (Bt bacteria) – kills mosquito/midge larvae.
• Copper algaecide (higher dose) kills many invertebrates but harms plants.
• Increase light on fountain – worms/larvae prefer dark.
• Don’t remove plants if present; they compete for nutrients.

Safety First

No poisons—animals drink from the pond. Routine cleaning (weekly) is acceptable; if daily, address the source.

Questions to Narrow Down

System size? Cleaning frequency? Exact worm description?