Symptoms
My fish looks unwell — where to start
Pick the symptom that matches what you're seeing. Each page tells you the most likely cause, how to tell it apart from the look-alikes, and the safe, husbandry-first next step — plus when to get a vet involved.
Ammonia Poisoning in Fish: Signs, Causes and What to Do
Ammonia poisoning is a top cause of new fish dying. How to spot the signs, drop ammonia fast with water changes, and stop it happening — husbandry-first.
Read →Cloudy Aquarium Water: What Causes It and How to Clear It
Cloudy aquarium water is usually a harmless bacterial bloom or fine sediment. How to tell what's causing it and the fastest safe way to clear it.
Read →Fish Gasping at the Surface: Causes and What to Do
Fish gasping at the surface usually means low oxygen, ammonia or nitrite, or gill irritation. How to tell which — and the fast steps that help now.
Read →Velvet Disease in Fish: Signs, Causes and What to Do Now
Velvet disease shows as a fine gold or rust dust and fast breathing. How to confirm it, why lights-off helps, and a husbandry-first treatment plan.
Read →White Spots on Fish: Is It Ich, and What to Do Now
White spots on your fish are usually ich (white spot disease). How to be sure, rule out look-alikes, and start a safe, husbandry-first treatment plan.
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