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.

Log your water parameters and stock over time, with safe-range checks for the species you keep.