| 1. Anchor Worms | Visible worms, lethargy, loss of appetite | Poor water quality, contaminated food | Metronidazole, praziquantel |
| 2. Betta Tumors | Visible growths, labored breathing | Genetic, environmental factors | Surgical removal, radiation therapy |
| 3. Cloud Eye | White, cloudy eyes | Bacterial infection, injury | Antibiotics, water changes |
| 4. Columnaris | White, cotton-like growths | Bacterial infection, poor water quality | Antibiotics, water changes |
| 5. Dropsy | Swollen body, labored breathing | Bacterial infection, poor water quality | Antibiotics, water changes |
| 6. Epistylis | White, cotton-like growths | Parasitic infection, poor water quality | Metronidazole, praziquantel |
| 7. Fin and Tail Rot | Rotting fins, lethargy | Bacterial infection, poor water quality | Antibiotics, water changes |
| 8. Fish Fungus | White, cotton-like growths | Fungal infection, poor water quality | Antifungal medication, water changes |
| 9. Fish Lice | Visible lice, lethargy | Parasitic infection, poor water quality | Praziquantel, water changes |
| 10. Furunculosis | Boils, lethargy | Bacterial infection, poor water quality | Antibiotics, water changes |
| 11. Gill Flukes | Labored breathing, lethargy | Parasitic infection, poor water quality | Praziquantel, water changes |
| 12. Hemorrhagic Mouth Fungus | Bleeding mouth, lethargy | Fungal infection, poor water quality | Antifungal medication, water changes |
| 13. Hole in the Head | Hole in head, lethargy | Nutritional deficiency, poor water quality | Dietary changes, water changes |
| 14. Ich or Ick | White spots, lethargy | Parasitic infection, poor water quality | Metronidazole, praziquantel |
| 15. Neon Tetra Disease | Fading color, lethargy | Parasitic infection, poor water quality | Metronidazole, praziquantel |
| 16. Popeye | Bulging eyes, lethargy | Bacterial infection, poor water quality | Antibiotics, water changes |
| 17. Septicemia | Red streaks, lethargy | Bacterial infection, poor water quality | Antibiotics, water changes |
| 18. Swim Bladder Disease | Labored swimming, lethargy | Poor water quality, nutritional deficiency | Water changes, dietary changes |
| 19. Velvet | Yellowish tint, lethargy | Parasitic infection, poor water quality | Metronidazole, praziquantel |
| 20. White Spot Disease | White spots, lethargy | Parasitic infection, poor water quality | Metronidazole, praziquantel |
