Comprehensive guides for every standard aquarium size — best fish, stocking numbers, required equipment, setup cost, and water change schedule.
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Open Volume Calculator →Ideal single-species nano tank
Best fish: Betta Fish, Cherry Shrimp, Nerite Snails…
The classic beginner starter tank
Best fish: Betta Fish, Neon Tetras, Guppies…
Best beginner community tank size
Best fish: Neon Tetras, Guppies, Corydoras Catfish…
Taller than 20-gal — great for angelfish
Best fish: Angelfish, Neon Tetras, Dwarf Gourami…
The 40 Breeder is a hobbyist favourite
Best fish: Discus, Angelfish, Rainbow Fish…
The classic community tank footprint
Best fish: Angelfish, Oscar Fish, Discus…
Same length as 55 but 5 in wider — much more stable
Best fish: Oscar Fish, Discus, Clown Loach…
Large display tank for serious hobbyists
Best fish: Oscar Fish, Discus, Clown Loach…
6-foot show tank — serious hobbyist territory
Best fish: Oscar Fish, Large Cichlid Community, Discus…