Fish Compatibility & Stocking Checker

Check if your fish choices are compatible and get a rough idea of how many you can keep in your tank.

Fish Stocking Planner

Choose your tank size and fish, and we’ll estimate stocking levels and highlight any obvious compatibility issues.

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Quick select:

Not sure of your tank volume? Use our tank volume & water weight calculator .

Community / tropical setups mix peaceful species like tetras, rasboras, gouramis, Corydoras and small plecos.

Preset stocking ideas:

Tick all species you’re planning to keep. We’ll check basic compatibility and suggest rough group sizes.

Peaceful community fish 🐠

Betta & nano 🐟

Goldfish & coldwater ❄️

Cichlids (basic) ⚔️

Shrimp & inverts 🦐