Aquarium keeping guide

Cloudy aquarium water: likely causes and useful actions

Cloudy water does not always have the same cause. Timing, color, tank age and water tests help choose a measured action.

In this guide

Use this guide to compare the real needs of cloudy aquarium water before changing the aquarium.

Stable parameters are usually safer than chasing a perfect number. pH, GH, KH, nitrates, CO2 and tank stability.

Identify algae, understand causes and act sustainably. Choose by height, light, substrate and parameters.

Small regular actions are safer than sudden large corrections. Always relate the observation to the age of the tank, water tests and recent changes.

Most failures come from rushing, mixing incompatible needs or correcting everything at once.

Check the minimum volume, water and behavior before choosing. pH, GH, KH, nitrates, CO2 and tank stability.

Always relate the observation to the age of the tank, water tests and recent changes. Identify algae, understand causes and act sustainably.

Open the detailed profiles before buying or treating anything. A good choice is also knowing when the aquarium is not suitable.

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.

Find useful profiles and content to compare options before acting.