Planning a new tank mate? List the species you're considering and get an instant compatibility read — no tank details needed yet
Species You're Considering
Add every species you want to keep together — we'll check temperament, aggression, and water chemistry conflicts between all of them.
💡 Why compatibility matters beyond just space: Two species can each have plenty of room and still be a bad match — mismatched water chemistry needs, size differences that lead to bullying or predation, and conflicting temperaments are just as important as tank volume. Check compatibility first, then size your tank once you know which species will actually work together.