Internal parasites are among the most common - and misunderstood - threats in aquariums. From subtle weight loss to sudden decline, worms can devastate fish if misdiagnosed. This guide cuts through myths with clear, evidence-based treatments trusted by professionals and hobbyists alike.

Few topics spark more debate among aquarists than how to administer deworming treatments. Some insist that adding medication to the water is the only reliable approach. Others argue that medicated food delivers a cleaner, more targeted cure. Both camps can point to real-world successes, yet the truth is more nuanced than either side likes to admit.

At Pufferfish Enthusiasts Worldwide, every guide is a living document shaped by science and experience. Our understanding of aquarium life never stops evolving, and neither do our articles. Each update, discussion, and observation from our global community helps refine these resources and keep them accurate, practical, and alive.