Which fish live well together in a 60-litre aquarium
A 60-litre aquarium can house a lovely community, provided you match its residents well. Compatibility is not just about space: it comes down to temperament, the need to live in a shoal and each species' water requirements. Social stress and aggression caused by a poor mix or a badly planned density have a real impact on fish welfare, a link established by research in aquaculture and ethology (research on Google Scholar). Our other pointers are in the aquarium habitat and setup section.
Species that get along in 60 litres
Small peaceful shoaling fish form the heart of a successful community: neon tetras, harlequin rasboras, guppies and platies thrive in groups. As long as they stay modest in size, a small shoal of corydoras brings the bottom of the tank to life without bullying anyone. The golden rule: keep shoaling fish in groups of at least six, because in insufficient numbers they get stressed and sometimes become shy or quarrelsome.
Cohabitation mistakes to avoid
Steer clear of territorial species or fish too large for 60 litres, as well as very fast swimmers that stress calm fish. Do not mix fish with opposite water needs, nor cold-water and tropical species. The betta case is telling: the male tolerates certain tank mates poorly, as we explain in our article on male betta aggression. Before mixing everything, weigh the species-only option, detailed in community or species-only aquarium.
Getting the numbers right
Even compatible, fish must stay reasonable in number to preserve water quality and limit tension. We detail this calculation in how many fish in a 60-litre aquarium, and the choice of first residents in the first fish for a 60-litre beginner tank. Introduce species gradually, never all on the same day.
Frequently asked questions
How many different species in a 60-litre tank?
Two to three well-chosen species are plenty and look more harmonious than a mosaic of lone fish.
Can you keep a betta in a community?
It is tricky: some tanks work, others do not. In 60 litres, a single betta in a controlled setup is often safer.
Do corydoras live alone?
No, they are gregarious fish: they need a small group to feel safe and show their natural behaviour.
This guide is part of Planète Pets’s Fishkeeping universe. Our advice is general in nature: for any health concern, your veterinarian remains the only reference.