Torn fins or fin rot?
A clean split after an encounter with decor differs from progressive fraying with discoloured tissue. Inspect the tank for sharp edges and fin-nipping companions. Photograph the area daily to see whether damage is spreading.
Cloudy eye needs context
One affected eye may follow injury; both eyes can suggest a wider environmental or disease problem. Telescope eyes protrude naturally, but new cloudiness or damage is not normal. Avoid handling that presses on the eyes.
Red spots and streaks
Inflammation, trauma, water irritation and infection can produce redness. Spreading lesions, bleeding or systemic illness warrant prompt veterinary attention. A photograph alone cannot reliably select an antibiotic.
Missing scales and recovery
Check for rubbing, net damage and unsafe gaps in ornaments. Keep water stable and minimise handling while skin heals. If lesions deepen or additional fish become affected, investigate disease rather than waiting for regrowth.
When to get professional help
Seek urgent help for severe breathing difficulty, bleeding, raised scales or inability to stay upright. Record exact water results and recent changes. A separate hospital aquarium must also be adequately filtered and aerated; an uncycled bowl can make the problem worse.
Frequently asked question
Should I medicate before testing the water?
Check water and oxygen promptly. Treatment should follow the likely cause; avoid mixing remedies without qualified guidance.
Sources and further reading
General husbandry and health references. Individual fish and local conditions vary.