Start here · Essential guide
Best Bottom-Dwelling Freshwater Fish
A guide to the best bottom-dwelling freshwater fish for home aquariums, including corydoras, loaches, plecos and otocinclus, with sizes, diets and tank tips.
Freshwater Fish
Loaches & Corydoras
Bottom dwellers: loaches and corydoras.
Black Kuhli Loach Tank Size
How big a tank do black kuhli loaches need? Learn about footprint, group size, whether a 10 gallon works, substrate, and common questions on hardiness and snails.
Clown Loach Care Guide
A practical clown loach care guide covering adult size, tank size, temperature, group needs, feeding, snails, ich and medication sensitivity, and tankmates.
Pygmy Cory Catfish Size and Tank Capacity
Pygmy corys stay around 1 inch. Learn adult size, how many fit in a 10 or 20 gallon tank, group size, sand vs gravel, and tankmates for a nano setup.
Zebra Loach Max Size and Group Needs
Zebra loaches (Botia striata) usually top out around 3.5 to 4 inches. Learn group size, tank needs, aggression, lifespan and whether they eat shrimp.
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