Tiny White Things or Bugs Swimming in My Fish Tank: Copepods, Ostracods or Detritus Worms?
Tiny white dots or thread-like worms swimming in your aquarium are usually harmless microfauna such as copepods, ostracods (seed shrimp), or detritus worms, not fish parasites. Learn how to identify them, tell them apart from ich, and reduce their numbers naturally.