Not every small moving thing in a shrimp tank is dangerous. Misidentification causes a lot of unnecessary panic. Many microfauna are harmless, while a smaller group deserves more caution because they can irritate shrimp, harm shrimplets, or explode under heavy feeding.
Worth learning to identify
- Planaria
- Hydra
- Vorticella
- Scutariella
- Detritus worms and harmless microfauna
Before using fenbendazole or similar products, check what else lives in the tank, especially snails. Many keepers lose wanted snails through careless treatment.