Fish and species compatibility checker
Check whether several fish, shrimp, corals or plants can live together: water type, temperature, pH, tank size, temperament and group size.
Neón ComúnParacheirodon innesi · View profile6
BettaBetta splendens · View profile1
Goldfish CometailCarassius auratus · View profile2
Compatibility
3 things to check- Incompatible No temperature range suits everyone: Betta needs 24–30 °C and Goldfish Cometail, 10–20 °C.
- Check Goldfish Cometail needs at least 240 l and the tank holds 100 l.
- Check Betta: aggressive behaviour alongside peaceful fish. Watch for bullying.
Ideal water for everyone
pH 7–7.5GH 8–10 °dGH
Based on WikiTank profiles.
Create your free account, add your tank and we’ll warn you when something stops fitting as you log your measurements.
Set up this tank on TankilyHow it’s calculated
We cross-check WikiTank species profiles: we look for a temperature, pH, hardness and salinity range that suits every species, check each one’s minimum tank size, whether it is reef safe, whether it needs a group and whether aggressive fish are mixed with peaceful ones. It is guidance: real behaviour depends on each animal and setup.