Freshwater fishkeeping
Build an aquarium that lives in harmony.
Choose your fish for the volume and water of your tank. Aquarius flags risky tankmates before you buy.
Three steps to a balanced tank.
Describe your water
Tank volume, pH, GH and temperature: only suitable species stay on offer.
Choose your stock
Add species and adjust their numbers, minimum group size included.
Check compatibility
Overstocking, aggression, predation or incompatible families: every risk is flagged.
- species listed
- species listed
- families
- families
- compatibility rules
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- compatibility rules
Where do your fish come from?
Spin the globe and tap a zone: the catalogue species that live there in the wild appear, with their observations.
Zones : Freshwater Ecoregions of the World, © 2008 The Nature Conservancy and World Wildlife Fund, Inc. Observations : GBIF.
From tetras to cichlids, find your future residents.
Photo: Dileepkumardr, CC0, via Wikimedia Commons
Ready to plan your next tank?
Try out a stocking plan before buying your fish: it is free and your choices stay saved in your browser.
Plan a tank