Fish compatibility checker

"Can I keep these fish together?" Use our database to troubleshoot community setups by matching species temperament and water chemistry.

What this tool does

This checker evaluates species against our curated husbandry database. It flags mismatches in temperature, pH, and adult size, while checking for behavioral risks like fin-nipping or predator/prey conflicts.

Related tools

Aquarium Stocking CalculatorCheck gallons, bioload, adult size, and group-size pressure.Water Parameter MatcherFind species that fit your temperature, pH, GH, and KH.Tank Setup GeneratorBuild stocking ideas around your tank size and setup goal.
Betta
Neon tetra in a freshwater aquarium
yellow

Conditional match

This pairing can work only when the warnings are handled deliberately.

Minimum tank10 gal
Temperature overlap76-78F
pH overlap6.5-7.5
GH overlap3-10 dGH
  • schooling_size_issueNeon Tetra should be kept in a group of at least 6, not as a single add-on.

Observed photo context

Observed aquarium photo examples

These photos show observed aquarium setups for the selected species. They are useful context, but they do not change the compatibility result or replace tank-size, temperament, group-size, and water-parameter checks.

Real-world aquarium context image from a Betta coexistence review.
Real-world aquarium context showing a Betta in a community setup.
Real-world aquarium context image from a Betta coexistence review.
Real-world aquarium context showing a Betta in a community setup.
Real-world aquarium context image from a Betta coexistence review.
Real-world aquarium context showing a Betta in a community setup.
Real-world aquarium context image from a Betta coexistence review.
Real-world aquarium context showing a Betta in a community setup.
Real-world aquarium context image from a Betta coexistence review.
Real-world aquarium context showing a Betta in a community setup.
Real-world aquarium context image from a Betta coexistence review.
Real-world aquarium context showing a Betta in a community setup.
Real-world aquarium context image from a Betta coexistence review.
Real-world aquarium context showing a Betta in a community setup.
Real-world aquarium context image from a Betta coexistence review.
Real-world aquarium context showing a Betta in a community setup.
Real-world aquarium context image from a Betta coexistence review.
Real-world aquarium context showing a Betta in a community setup.
Real-world aquarium context image from a Betta coexistence review.
Real-world aquarium context showing a Betta in a community setup.
Real-world aquarium context image from a Betta coexistence review.
Real-world aquarium context showing a Betta in a community setup.
Real-world aquarium context image from a Betta coexistence review.
Real-world aquarium context showing a Betta in a community setup.
Real-world aquarium context image from a Betta coexistence review.
Real-world aquarium context showing a Betta in a community setup.
Real-world aquarium example showing multiple female Bettas observed in the same tank.
Real-world aquarium context showing multiple female Bettas in the same tank.
Real-world aquarium example showing multiple female Bettas observed in the same tank.
Real-world aquarium context showing multiple female Bettas in the same tank.
Real-world aquarium example showing a Betta observed with Corydoras catfish and a Mystery Snail.
Real-world aquarium photo showing a Betta observed with Corydoras catfish and a Mystery Snail in a planted setup.
Real-world aquarium example showing a Betta observed with shrimp in a planted tank.
Real-world aquarium photo showing a Betta observed with shrimp in a planted setup.
Real-world aquarium example showing a Betta observed with shrimp and snails.
Real-world aquarium photo showing a Betta observed with shrimp and snails.
Real-world aquarium example showing a Betta observed with shrimp.
Real-world aquarium photo showing a Betta observed with shrimp.

Open: Betta | Neon Tetra | checker