Freshwater Tropical
Cloudy Eye
Hazy or opaque film over one or both eyes — usually a sign of bacterial infection or chronic…
Moderate
Aquarium fish health · diagnosis & equipment
Diagnose. Treat. Save your fish.
A complete reference for ornamental-fish disease diagnosis — paired with the equipment that prevents, monitors, and treats it. Trusted by hobbyists, breeders, koi keepers, and aquariums.
Find the problem & the fix
Pick what you see on your fish. We'll rank the most likely conditions and show the equipment that helps treat or prevent each one.
Pick a symptom to see likely conditions and the equipment that helps.
Most-searched diseases
Freshwater Tropical
Hexamita (Hole-in-the-Head)
Intestinal flagellate parasite causing pitted lesions on the head and lateral line, especially in cichlids and discus. Often…
Moderate
Goldfish
White Tail Disease in Koi & Goldfish
White tail disease is a serious and poorly understood condition caused by microsporidian intracellular parasites that destroy muscle…
Moderate To To To Severe
Goldfish
Bacterial Diseases in Koi & Goldfish
Bacterial diseases are among the most common and serious health challenges facing koi and goldfish keepers worldwide. Caused…
Moderate To To To Severe
Goldfish
Parasitic Diseases in Koi & Goldfish
Parasitic infestations represent one of the most diverse disease categories in ornamental fish keeping. From the microscopic ciliate…
Mild To To To Severe
Freshwater Tropical
Columnaris
A highly contagious bacterial infection (Flavobacterium columnare) presenting as white/grey patches, often on the mouth, fins, or gills.…
Severe
Goldfish
Fungal Diseases in Koi & Goldfish
Fungal diseases — most commonly caused by water moulds of the genus Saprolegnia — are a frequent secondary…
Moderate
Freshwater Tropical
Swim Bladder Disorder
Loss of buoyancy control — fish floats, sinks, or swims at odd angles. Common in fancy goldfish and…
Moderate
Popular equipment
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Monitoring
Water Quality Sensor Hub
Multi-parameter disease prevention
from $200–$5000
View details →About Fishyfarmacy.com
Healthier fish, fewer treatments
Fishyfarmacy.com helps hobbyists and professionals stop fish disease before it starts. We pair a deep, plain-English diagnosis library with the equipment that keeps water clean, stable, and safe — because the best treatment is the one you never need.
Every recommendation is mapped to the conditions it actually addresses, so you can move straight from a symptom to a fix.
56Conditions documented
35Equipment picks
FreeSymptom checker
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