Dimilin 100g powder for the treatment of Lernaea (anchor worm), Argulus (fish lice), gill maggot (Ergasilus) or any other chitin-based insects too. Dosage: 1g per 1000 litre (for 250g/kg Diflubenzuron active ingredient) Symptoms of anchor worm can be as follows: 1. Anchor worms (Lernaea) can be seen with the naked eye 2. Tiny white-green or red worms in wounds 3. Frequent rubbing or "flashing" 4. Localized redness 5. Inflammation on the body of the fish 6. Breathing difficulties 7. General lethargy