Roshan Aquva World
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Fungal Infection Clinical Pathology
Cotton Wool Disease (Saprolegnia)
Cotton-wool disease commonly refers to an external water-mold infection such as Saprolegnia. It produces white, grey, or brown cotton-like growths on damaged skin, fins, eyes, or eggs and often develops after injury, parasite damage, or other stressors. Saprolegnia is an oomycete rather than a true fungus.
Critical Medication Precaution
Always isolate sick fish in a dedicated quarantine or hospital tank before applying medications. Certain active compounds (like copper, malachite green, or formalin) and temperature shifts can be harmful to snails, shrimp, delicate scale-less fish (like Corydoras), and live plants.
Key Clinical Symptoms
- White or grey cotton-like, fuzzy tufts on the skin or fins
- Fungal growths forming around open wounds or sores
- Clamped fins and scratching behavior
- Lethargy and fading skin color
Diagnose early! Pathogen replication accelerates exponentially once physical symptoms appear.
Transmission & Etiology
Saprolegnia and related water molds are widespread in aquatic environments and commonly colonize damaged or dead tissue. Outbreaks are associated with injury, poor sanitation, organic debris, parasites, and other stressors.
Most Susceptible Species:Tetras, Livebearers, Goldfish, Bettas
Affected Ecosystem Types:Any species with physical injuries or compromised slime coat
Step-by-Step Clinical Treatment Protocol
1
Correct water-quality and sanitation problems and remove dead or decaying material from the aquarium.
2
Isolate the affected fish when practical, especially if it needs targeted treatment or close observation.
3
Use an appropriate treatment for external Saprolegnia or other suspected water molds according to the product label or fish-health professional advice.
4
Do not use salt as a universal treatment; use it only when appropriate for the species and other aquarium inhabitants.
5
Maintain clean, well-oxygenated water and minimize further handling or injury.
RELATED PATHOLOGY
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Educational Guidance Notice
Information on Roshan Aquva World is provided for general educational purposes. Aquarium requirements can vary depending on individual animals, aquarium conditions, source information, and husbandry practices. Content is periodically reviewed and may be updated as information develops.
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