Identifying the Stages
Mild: ragged or frayed fin edges, slight discoloration.
Moderate: white/black edges, visible erosion of fin tissue.
Severe: fins dissolved to body, secondary infections, ulcers.
Mild Cases (Water Quality Fix)
Often caused by ammonia/nitrite levels or chronic stress. Improve water quality first — daily 30% water changes for 7 days.
Add aquarium salt 1 teaspoon per 5 gallons (skip for sensitive species).
- ✦Test ammonia and nitrate immediately — fin rot is usually environmental
- ✦Indian almond leaves provide natural antibacterial benefit
- ✦Keep stress low — no new fish, no temperature changes
Moderate to Severe Cases
Use a broad-spectrum antibiotic like Kanaplex (kanamycin) or Furan-2 (nitrofurazone).
Treat in a quarantine tank if possible. Remove activated carbon during treatment.
Recovery and Prevention
Fins regrow over 4-8 weeks if base is intact. Initial regrowth is clear/transparent.
Prevent recurrence: weekly water changes, no overstocking, avoid known fin-nippers in community tanks.