The Fish Disease Field Guide

A fish looks wrong and the instinct is to buy something and dose it. That instinct kills more fish than the original problem, because most aquarium illness is secondary to something in the water.

This guide works the other way round: identify first, correct the environment, then treat the specific pathogen with the specific medication.

What is inside

• A five-step first response to run before buying any treatment
• The thirty-second daily check: ten things to look at and what a change means
• A 15-row symptom index that takes you from what you can see to a likely cause
• Full protocols for ich, velvet, flukes, internal parasites, fin rot, fungus and columnaris
• How to tell fungus from columnaris, and why guessing wrong costs you the fish
• Dropsy, popeye, swim bladder disorder and hole-in-the-head explained
• A ten-treatment medication reference with cautions, plus five rules for dosing
• Quarantine and hospital tank setup, and a printable treatment log

Who it is for

Freshwater keepers who want to identify a problem correctly before medicating, and who would rather prevent the next outbreak than treat it.

This is a hobbyist reference for ornamental fish, not veterinary advice.

Format

Instant digital download. 9-page PDF, A4, formatted for both screen and home printing. Nothing is shipped. Your download link appears on the confirmation page and in your email receipt.