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Fish for smaller aquariums

Minimums that fit nano and mid-size tanks — one species plan, not a crowded mix.

Each species here has a small enough minimum volume and adult size for a nano or mid-size tank. That does not make 60L a free-for-all community. One filter, one heater, one footprint. Pick one species you want to watch, stock its proper group, and wait weeks before adding a second species.

43 species fit a 60L minimum and stay under 10cm adult, with no predatory flag set.

Keeper decision notes

The instinct in a small tank is to add variety. Do the opposite: pick one species you want to watch, stock its proper group, and live with the empty look for a few weeks before a second species. Most failed nano tanks are stocked the wrong way, not too small for what is in them.

Every row is a real profile. The list moves when a record changes. Shortlist names, then verify litres, water, and mates on each profile before you buy.

Fish on this list

Next steps

Shortlist a few names from this guide, then verify the real mix before you buy.

Open pair checkerOpen this plan in builder

Tank hubs: 30L · 40L · 60L

Before livestock: tank setup checklist · filter size · beginner plants.

Other guides

Smaller tanks — quick answers

What does the “Smaller tanks” list include?
43 species fit a 60L minimum and stay under 10cm adult, with no predatory flag set.
How many species fit in a nano or 60L tank?
Usually one schooling species — or one centrepiece — not a crowded mix. Small minimums on this list do not make 60L a free-for-all community. Stock the proper group and wait before adding a second species.
How should I use this small-tank list?
Filter by your exact litre count on each profile, pick one species you want to watch, and verify mates only after the first group is settled.
Which species appear on this guide right now?
Examples currently matching include Betta, Blue Dream Shrimp, Cherry Shrimp, Chili Rasbora, plus 39 more. Counts change as the library grows.