Stock it right
Lists that come from the same tank model as your own tank: sizes, water and tank-mate clashes.
By tank size
Best fish for a 5 gallon tank
Which fish and shrimp fit a 5 gallon aquarium (19 L), how many of each, and which popular species outgrow it. Checked by a stocking model.
Best fish for a 10 gallon tank
Which fish and shrimp fit a 10 gallon aquarium (38 L), how many of each, and which popular species outgrow it. Checked by a stocking model.
Best fish for a 20 gallon tank
Which fish and shrimp fit a 20 gallon aquarium (76 L), how many of each, and which popular species outgrow it. Checked by a stocking model.
Best fish for a 29 gallon tank
Which fish and shrimp fit a 29 gallon aquarium (110 L), how many of each, and which popular species outgrow it. Checked by a stocking model.
Best fish for a 40 gallon tank
Which fish and shrimp fit a 40 gallon aquarium (151 L), how many of each, and which popular species outgrow it. Checked by a stocking model.
Best fish for a 55 gallon tank
Which fish and shrimp fit a 55 gallon aquarium (208 L), how many of each, and which popular species outgrow it. Checked by a stocking model.
Best fish for a 75 gallon tank
Which fish and shrimp fit a 75 gallon aquarium (284 L), how many of each, and which popular species outgrow it. Checked by a stocking model.
Best fish for a 125 gallon tank
Which fish and shrimp fit a 125 gallon aquarium (473 L), how many of each, and which popular species outgrow it. Checked by a stocking model.
Tank mates
Betta tank mates
The best tank mates for bettas, the risky ones and the ones to avoid, each checked for size, temperament, fin nipping and water.
Angelfish tank mates
The best tank mates for angelfish, the risky ones and the ones to avoid, each checked for size, temperament, fin nipping and water.
Fancy guppy tank mates
The best tank mates for fancy guppies, the risky ones and the ones to avoid, each checked for size, temperament, fin nipping and water.
Goldfish tank mates
The best tank mates for goldfish, the risky ones and the ones to avoid, each checked for size, temperament, fin nipping and water.
Oscar tank mates
The best tank mates for oscars, the risky ones and the ones to avoid, each checked for size, temperament, fin nipping and water.
Cherry shrimp tank mates
The best tank mates for cherry shrimp, the risky ones and the ones to avoid, each checked for size, temperament, fin nipping and water.
Neon tetra tank mates
The best tank mates for neon tetras, the risky ones and the ones to avoid, each checked for size, temperament, fin nipping and water.
Harlequin rasbora tank mates
The best tank mates for harlequin rasboras, the risky ones and the ones to avoid, each checked for size, temperament, fin nipping and water.
Panda corydoras tank mates
The best tank mates for panda corydoras, the risky ones and the ones to avoid, each checked for size, temperament, fin nipping and water.
Otocinclus tank mates
The best tank mates for otocinclus, the risky ones and the ones to avoid, each checked for size, temperament, fin nipping and water.
Tiger barb tank mates
The best tank mates for tiger barbs, the risky ones and the ones to avoid, each checked for size, temperament, fin nipping and water.
Amano shrimp tank mates
The best tank mates for Amano shrimp, the risky ones and the ones to avoid, each checked for size, temperament, fin nipping and water.
Black neon tetra tank mates
The best tank mates for black neon tetras, the risky ones and the ones to avoid, each checked for size, temperament, fin nipping and water.
Black widow tetra tank mates
The best tank mates for black widow tetras, the risky ones and the ones to avoid, each checked for size, temperament, fin nipping and water.
Blood parrot cichlid tank mates
The best tank mates for blood parrot cichlids, the risky ones and the ones to avoid, each checked for size, temperament, fin nipping and water.
Blue dolphin cichlid tank mates
The best tank mates for blue dolphin cichlids, the risky ones and the ones to avoid, each checked for size, temperament, fin nipping and water.
Bristlenose pleco tank mates
The best tank mates for bristlenose plecos, the risky ones and the ones to avoid, each checked for size, temperament, fin nipping and water.
Bronze cory tank mates
The best tank mates for bronze corys, the risky ones and the ones to avoid, each checked for size, temperament, fin nipping and water.
Cardinal tetra tank mates
The best tank mates for cardinal tetras, the risky ones and the ones to avoid, each checked for size, temperament, fin nipping and water.
Cherry barb tank mates
The best tank mates for cherry barbs, the risky ones and the ones to avoid, each checked for size, temperament, fin nipping and water.
Chinese algae eater tank mates
The best tank mates for Chinese algae eaters, the risky ones and the ones to avoid, each checked for size, temperament, fin nipping and water.
Clown loach tank mates
The best tank mates for clown loaches, the risky ones and the ones to avoid, each checked for size, temperament, fin nipping and water.
Common pleco tank mates
The best tank mates for common plecos, the risky ones and the ones to avoid, each checked for size, temperament, fin nipping and water.
Convict cichlid tank mates
The best tank mates for convict cichlids, the risky ones and the ones to avoid, each checked for size, temperament, fin nipping and water.
Demasoni tank mates
The best tank mates for demasoni, the risky ones and the ones to avoid, each checked for size, temperament, fin nipping and water.
Discus tank mates
The best tank mates for discus, the risky ones and the ones to avoid, each checked for size, temperament, fin nipping and water.
Dwarf gourami tank mates
The best tank mates for dwarf gouramis, the risky ones and the ones to avoid, each checked for size, temperament, fin nipping and water.
Fairy cichlid tank mates
The best tank mates for fairy cichlids, the risky ones and the ones to avoid, each checked for size, temperament, fin nipping and water.
Firemouth cichlid tank mates
The best tank mates for firemouth cichlids, the risky ones and the ones to avoid, each checked for size, temperament, fin nipping and water.
Glowlight tetra tank mates
The best tank mates for glowlight tetras, the risky ones and the ones to avoid, each checked for size, temperament, fin nipping and water.
Golden mbuna tank mates
The best tank mates for golden mbuna, the risky ones and the ones to avoid, each checked for size, temperament, fin nipping and water.
Honey gourami tank mates
The best tank mates for honey gouramis, the risky ones and the ones to avoid, each checked for size, temperament, fin nipping and water.
Iridescent shark tank mates
The best tank mates for iridescent sharks, the risky ones and the ones to avoid, each checked for size, temperament, fin nipping and water.
Jewel cichlid tank mates
The best tank mates for jewel cichlids, the risky ones and the ones to avoid, each checked for size, temperament, fin nipping and water.
Kribensis tank mates
The best tank mates for kribensis, the risky ones and the ones to avoid, each checked for size, temperament, fin nipping and water.
Kuhli loach tank mates
The best tank mates for kuhli loaches, the risky ones and the ones to avoid, each checked for size, temperament, fin nipping and water.
Leopard sailfin pleco tank mates
The best tank mates for leopard sailfin plecos, the risky ones and the ones to avoid, each checked for size, temperament, fin nipping and water.
Molly tank mates
The best tank mates for mollies, the risky ones and the ones to avoid, each checked for size, temperament, fin nipping and water.
Multies tank mates
The best tank mates for multies, the risky ones and the ones to avoid, each checked for size, temperament, fin nipping and water.
Peacock cichlid tank mates
The best tank mates for peacock cichlids, the risky ones and the ones to avoid, each checked for size, temperament, fin nipping and water.
Pearl gourami tank mates
The best tank mates for pearl gouramis, the risky ones and the ones to avoid, each checked for size, temperament, fin nipping and water.
Peppered cory tank mates
The best tank mates for peppered corys, the risky ones and the ones to avoid, each checked for size, temperament, fin nipping and water.
Platy tank mates
The best tank mates for platies, the risky ones and the ones to avoid, each checked for size, temperament, fin nipping and water.
Rainbow shark tank mates
The best tank mates for rainbow sharks, the risky ones and the ones to avoid, each checked for size, temperament, fin nipping and water.
Ram cichlid tank mates
The best tank mates for ram cichlids, the risky ones and the ones to avoid, each checked for size, temperament, fin nipping and water.
Red-tailed black shark tank mates
The best tank mates for red-tailed black sharks, the risky ones and the ones to avoid, each checked for size, temperament, fin nipping and water.
Rosy barb tank mates
The best tank mates for rosy barbs, the risky ones and the ones to avoid, each checked for size, temperament, fin nipping and water.
Rummy-nose tetra tank mates
The best tank mates for rummy-nose tetras, the risky ones and the ones to avoid, each checked for size, temperament, fin nipping and water.
Serpae tetra tank mates
The best tank mates for serpae tetras, the risky ones and the ones to avoid, each checked for size, temperament, fin nipping and water.
Severum tank mates
The best tank mates for severums, the risky ones and the ones to avoid, each checked for size, temperament, fin nipping and water.
Siamese algae eater tank mates
The best tank mates for Siamese algae eaters, the risky ones and the ones to avoid, each checked for size, temperament, fin nipping and water.
Swordtail tank mates
The best tank mates for swordtails, the risky ones and the ones to avoid, each checked for size, temperament, fin nipping and water.
Three spot gourami tank mates
The best tank mates for three spot gouramis, the risky ones and the ones to avoid, each checked for size, temperament, fin nipping and water.
White Cloud Mountain minnow tank mates
The best tank mates for White Cloud Mountain minnows, the risky ones and the ones to avoid, each checked for size, temperament, fin nipping and water.
Yellow lab tank mates
The best tank mates for yellow labs, the risky ones and the ones to avoid, each checked for size, temperament, fin nipping and water.
Zebra danio tank mates
The best tank mates for zebra danios, the risky ones and the ones to avoid, each checked for size, temperament, fin nipping and water.
Zebra mbuna tank mates
The best tank mates for zebra mbuna, the risky ones and the ones to avoid, each checked for size, temperament, fin nipping and water.
Picks
Best fish for beginners
Hardy, peaceful fish and shrimp for a first aquarium: forgiving of small mistakes, easy to feed and safe in a community.
Peaceful community fish
Calm, small species that mix well in a planted community aquarium.
Nano fish for small tanks
Tiny fish and shrimp under 1.5 inches that suit nano aquariums of 5 to 15 gallons.
Shrimp-safe fish
Fish that neither hunt dwarf shrimp nor their babies, for a planted tank with a shrimp colony.
Coldwater fish
Fish that live at room temperature and do not need an aquarium heater.
Algae eaters
Fish and shrimp that graze algae and leftovers, from tiny otocinclus to bristlenose plecos.
Bottom dwelling fish
Corydoras, loaches and plecos: species that live on the substrate and fill the empty bottom of a community tank.