Aquendium

Freshwater reference

Research-backed care guides, water parameters, compatibility, and tools — written carefully so you can make better decisions for your tank.

Species care guides

Detailed care sheets for popular freshwater species — covering tank size, water parameters, tankmates, and common problems.

Long-form guides on the fundamentals — cycling a new tank, water changes, and more.

Practical tools for working out the numbers behind your tank — water volume, heater wattage, and more.