Plan a healthy freshwater aquarium
Aquastock helps you stock the right fish for your tank. Use the calculator, check compatibility between any two species, and read care guides for 36+ popular freshwater fish.
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Stocking calculator
How many fish fit your tank?
Compatibility checker
Can two species live together?
Fish species
36 care guides
Tank sizes
Stocking ideas by gallon
Popular categories
Featured species
Neon Tetra
10 gal · Easy
Cardinal Tetra
20 gal · Moderate
Ember Tetra
10 gal · Easy
Guppy
10 gal · Easy
Endler's Livebearer
10 gal · Easy
Platy
10 gal · Easy
Molly
20 gal · Easy
Swordtail
20 gal · Easy
Betta (male)
5 gal · Easy
Dwarf Gourami
10 gal · Moderate
Pearl Gourami
30 gal · Easy
Honey Gourami
10 gal · Easy