Female Goldfish with Skin Damage: Spawning Injury and Fungus

Observation

Female goldfish removed to hospital tank. Skin sloughing, fuzzy patches, one eye cloudy. Treating with MelaFix + PimaFix; improving. Was alone last year (hiding), moved to community pond (active but attacked).

Diagnosis

Spawning injury: Males chase female, bump her into rocks to release eggs. Causes scale loss, skin tears → secondary fungus (Saprolegnia).

Treatment

1. Continue MelaFix (tea tree oil) + PimaFix (bay oil) – good for mild fungus/bacteria.
2. Add aquarium salt (1 tbsp/gal) to reduce osmotic stress.
3. Keep in hospital tank until fully healed (no fuzzy patches, scales regrown).
4. Do 25% water changes every 2–3 days (not day 5) to keep water pristine.

Prevention

Add spawning mops (nylon rope bundles) to give females refuge. Provide dense plants. Ensure pond not overcrowded.

Reintroduction

Return only when completely healed. Monitor for renewed aggression.