Aquarium Information Source
Freshwater Fish Compatibility Chart
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Freshwater Fish Compatibility Chart
This article is copyright 1998 by Dennis A. Peters. This article shall not be
used for commercial purposes in any manner without prior written permission from
the author. This article may be used for non-commercial purposes free of charge,
as long as this statement is included and intact.
The chart below contains most of the more common freshwater fish that you
will find at your local pet shop. I have divided the list into 3 categories of
behavior, and defined as follows:
Community Fish : Unless marked with a note, these fish can be safely mixed
together in the same aquarium.
Semi-Aggressive : These fish are usually peaceful when they are small, but can
become fin nippers or chase the others around the tank when
they get bigger. If you really want to put one of these fish
in your community tank, you can, but keep an eye on them as
they get bigger.
Aggressive Fish : Do not mix these fish with any other type fish except similar
sized aggressive fish. They will bully and even eat smaller
and more timid fish.
Category Community Semi-Aggressive Aggressive
=======================================================================================
Anabantids
Dwarf Gourami Honey Gourami Black Paradisefish
Flame Gourami Kissing Gourami
Opaline Gourami
Pearl Gourami
Siamese Fighting Fish/Betta(1)
Spiketailed Paradisefish
Catfish
Banjo Catfish Bumble Bee Catfish
Bristlenose
Chinese Algae Eater
Corydoras
Green Catfish
Leopard Catfish
Plecostomus
Spotted Catfish
Upside Down Catfish
Charachins
Black Neon Tetra Black Widow Red Belly Piranha
Black Phantom Tetra Bleeding Heart Tetra
Cardinal Tetra Buenos Aires Tetra
Congo Tetra Silver Dollar
Emperor Tetra
Flame Tetra
Glowlight Tetra
Head & Tail Light Tetra
Neon Tetra
Rummy Nosed Tetra
Serpae Tetra
Hatchetfish
Pencilfish
Bloodfin
Penguin Fish
X-Ray Fish
Cichlids
Angelfish Firemouth Convict
Blue Acara Severum Green Terror
Discus (2) Jack Dempsey
Festivum Red Oscar
Ram
Cyprinids
Cherry Barb Flying Fox
Bala (Tri-Color) Shark Green Tiger Barb
Black Shark Red Tailed Shark
Blue Danio Rosy Barb
Giant Danio Tiger Barb
White Cloud Tinfoil Barb
Zebra Danio
Harlequin Rasbora
Killifish
Lyretail
Livebearers
Guppy Swordtail Knife Livebearer
Molly
Platy
Loaches
Clown Loach
Dwarf Loach
Horseface Loach
Unclassified
Australian Rainbowfish Archer Butterfly Fish
Boesmani Rainbowfish Freshwater Puffer
Boesman's Rainbowfish
Bumble Bee Goby
Elephant Nose
Rainbowfish
NOTES:
(1) Only 1 male Siamese Fighting Fish/Betta per tank. 2 Males will fight to the death
if they are in the same tank! You can have as many females in the tank as you wish.
(2) Discus should not be kept with other fish other than catfish, loaches, neons, or
cardinal tetras. This is due to the fact that they are very susceptible to disease,
they require a warmer water temperature (85 degrees F), and are sometimes slow eaters
and will not fight for food.
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