Context
Always relate the observation to the age of the tank, water tests and recent changes. Diseases
Aquarium keeping guide
Sick fish: observe, diagnose and act calmly
A sick fish requires observation before treatment. Breathing, swimming, appetite, skin, fins and water parameters often provide the first clue.
In this guide
Diseases
Guide to observing a sick fish and connecting symptoms, water, behavior and disease profiles before acting.
Understand water
Read pH, GH, KH, nitrates, CO2 and stability before choosing species or correcting water. Stable parameters are usually safer than chasing a perfect number. Small regular actions are safer than sudden large corrections.
Search
Quickly find a species or aquarium term, then continue to the useful profiles. Open the detailed profiles before buying or treating anything.
Observe and compare
Look at volume, water, behavior and warning signs together instead of deciding from one detail.
Stability
Stable parameters are usually safer than chasing a perfect number. Read pH, GH, KH, nitrates, CO2 and stability before choosing species or correcting water.
Routine
Small regular actions are safer than sudden large corrections. Always relate the observation to the age of the tank, water tests and recent changes.
Choice
Open the detailed profiles before buying or treating anything. Diseases
Useful habits
A short list to keep in mind before opening profiles or other guides.
Check the minimum volume, water and behavior before choosing.
Always relate the observation to the age of the tank, water tests and recent changes.
Stable parameters are usually safer than chasing a perfect number.
Open the detailed profiles before buying or treating anything.
Continue exploring
Find useful profiles and content to compare options before acting.