Fish Tank Sizes: Litres, Dimensions & the Best Fish for Each
Not sure what fish suit your tank? Pick your tank size below for litres, weight, stocking numbers and a hand-picked list of fish that fit.
Nano (20-40 Litre)
Nano tanks are perfect for a single betta, a shrimp colony or a tiny school of nano fish. Stability is the challenge, so go slow and avoid messy or large species.
Best fish →2ft / 60cm (≈75 Litre)
A 2ft tank is a brilliant first community tank or a stylish betta/shrimp setup. There is room for a small school plus a clean-up crew.
Best fish →3ft / 90cm (≈120 Litre)
The 3ft tank is the community sweet spot - stable, affordable and big enough for several schools and a centrepiece fish.
Best fish →4ft / 120cm (≈200 Litre)
A 4ft tank opens up serious options: large community schools, medium cichlids, or a planted showpiece. A great long-term tank.
Best fish →5ft / 150cm (≈300 Litre)
A 5ft tank suits bigger and messier fish, large schools, and impressive community or cichlid displays. Strong filtration is a must.
Best fish →6ft / 180cm (≈450 Litre)
A 6ft tank is a true centrepiece aquarium for large fish like oscars and big cichlids, or a stunning, heavily-stocked community.
Best fish →