Fish Stress or Unexplained Mortality

What this symptom may mean

Low DO, temperature, pH, ammonia, nitrite, toxins, disease, crowding and poor exchange can cause similar signs.

Information and testing priorities

• Immediately measure DO, temperature, pH, ammonia and nitrite; preserve records and involve an aquatic-health professional.

Responsible treatment pathway

• Provide emergency oxygen where appropriate while identifying the cause. Equipment alone does not correct disease or toxicity.

Urgency

Emergency response may be required.

What to send Puroxi

• Complete laboratory report and sampling date
• Source, intended use, volume, flow and photographs
• History of the symptom and existing equipment or treatment
• Required outcome and any applicable health, animal, process or discharge requirements

Important technical notice

Possible causes are not a diagnosis. Do not use this page to declare water safe, prescribe a chemical dose or delay emergency, health, veterinary or regulatory action. Testing and site-specific review are required.