Freshwater Tropical
Columnaris
A highly contagious bacterial infection (Flavobacterium columnare) presenting as white/grey patches, often on the mouth, fins, or gills.…
Severe
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
Freshwater Tropical
Cloudy Eye
Hazy or opaque film over one or both eyes — usually a sign of bacterial infection or chronic…
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
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
Aeromonas (Ulcer Disease)
Bacterial infection causing open ulcers, hemorrhagic patches, and red sores. The #1 cause of mortality in koi ponds…
Critical
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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
Every system fails differently
The same parasite behaves differently in a desktop tank, a koi pond in March and a recirculating farm. Guidance is written per setting, not in general.
Guides & industry news
Practical fish-health writing on the left; what is moving in aquaculture and the aquarium trade on the right.
Latest guide
Aquaculture UK Gears Up for Largest Ever Exhibition in Glasgow
By: Aquaculture UK The UK’s leading aquaculture show is gearing up for a bigger than ever exhibition this year as it prepares to launch at its…
Read it →
Latest news
Singapore Opens Aquafeed Innovation Centre to Advance Tropical Marine Aquaculture
Singapore has launched a new aquafeed innovation centre dedicated to developing sustainable, high-performance feeds for tropical marine aquaculture species, addressing a critical gap in regional feed…
Read it →
Latest news
Singapore Opens Aquafeed Innovation Centre to Advance Tropical Marine Aquaculture
Singapore has launched a new aquafeed innovation centre dedicated to developing sustainable, high-performance feeds for tropical marine aquaculture species, addressing a critical gap in regional feed…
Read it →
More industry news
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