| | usually compatible |
| | sometimes compatible |
| | rarely compatible |
| African (asst.) | Angelfish | Asian Fish (asst.) | Barb | Betta | Catfish (Corydoras) | Catfish (Synodontis) | Catfish/Scavenger | Central American (asst.) | Danio | Discus | Dwarf Gourami | Eel | Fancy Guppy | Goldfish | Gourami | Haplochromis | Invertebrate | Killie Fish | Knife Fish | Koi | Lake Malawi Cichlid | Lake Tanganyika Cichlid | Lake Victoria Cichlid | Loaches/Botia | Molly | Mono/Scat | Oscars | Platies/Variatus | Plecostomus | Puffers/Brackish (asst.) | Rainbowfish | Rasbora | Shark | South American (asst.) | South American Cichlid | S. American Cichlid (Dwarf) | Swordtail | Tetra | West African Cichlid | Plant |
| African (asst.) | H | H | M | H | H | H | H | M | H | H | L | H | H | H | M | H | M | M | L | M | L | M | M | M | H | H | H | M | M | H | H | H | H | H | H | M | H | H | H | M | H |
| Angelfish | H | H | M | M | M | H | H | M | H | H | L | H | H | L | L | M | L | M | L | M | L | L | M | L | H | H | M | L | H | H | L | H | H | H | H | L | H | H | H | M | H |
| Asian Fish (asst.) | M | M | M | H | H | H | H | H | L | H | L | H | L | H | L | M | L | M | L | M | L | L | L | L | M | H | M | L | H | H | L | H | H | M | L | L | H | H | H | L | H |
| Barb | H | M | H | H | M | H | H | M | H | H | L | M | H | M | L | M | M | M | M | M | L | M | M | M | H | H | H | L | H | H | M | M | H | H | H | M | H | H | M | H | H |
| Betta | H | M | H | M | L | H | H | M | H | M | L | H | M | M | L | M | L | M | L | M | L | L | L | L | H | H | L | L | H | H | L | H | H | M | H | L | M | M | H | L | H |
| Catfish (Corydoras) | H | H | H | H | H | H | H | M | H | H | H | H | H | H | M | H | M | H | H | M | L | L | M | L | H | H | M | L | H | H | M | H | H | H | H | M | H | H | H | H | H |
| Catfish (Synodontis) | H | H | H | H | H | H | H | M | H | H | L | H | H | M | M | H | H | H | H | M | L | H | H | H | H | H | M | M | H | H | M | H | H | H | H | M | H | H | H | H | H |
| Catfish/Scavenger | M | M | H | M | M | M | M | M | M | M | L | M | M | M | M | M | M | H | H | M | M | M | M | M | M | M | M | M | M | M | M | M | M | M | M | M | M | M | M | M | M |
| Central American (asst.) | H | H | L | H | H | H | H | M | H | H | L | M | M | L | M | H | M | L | L | H | L | M | H | M | M | H | H | M | H | H | H | H | H | H | H | M | H | H | M | H | M |
| Danio | H | H | H | H | M | H | H | M | H | H | L | H | H | M | M | H | M | H | H | M | L | M | M | M | H | H | M | L | H | H | H | H | H | H | H | L | H | H | H | H | H |
| Discus | L | L | L | L | L | H | L | L | L | L | H | L | L | L | L | L | L | L | L | L | L | L | L | L | L | L | L | L | L | L | L | L | L | L | L | L | H | L | M | L | H |
| Dwarf Gourami | H | H | H | M | H | H | H | M | M | H | L | H | H | H | M | M | L | M | M | M | L | L | L | L | H | H | L | L | H | H | M | H | H | H | M | L | H | H | H | M | H |
| Eel | H | H | M | H | M | H | H | M | M | H | L | H | M | L | M | H | M | M | L | M | L | L | M | L | H | H | H | M | H | H | H | H | H | H | M | M | H | H | M | M | H |
| Fancy Guppy | H | L | H | M | M | H | M | M | L | M | L | H | L | H | L | L | L | H | L | M | L | L | L | L | M | H | L | L | H | H | M | M | H | L | L | L | L | L | M | L | H |
| Goldfish | M | L | L | L | L | M | M | M | M | M | L | M | M | L | H | M | L | L | L | M | H | L | L | L | M | M | L | L | M | M | L | L | M | M | M | L | M | M | L | L | M |
| Gourami | H | M | M | M | M | H | H | M | H | H | L | M | H | L | M | H | L | M | M | M | L | L | M | L | H | H | H | L | H | H | H | H | H | H | H | M | H | H | H | M | H |
| Haplochromis | M | L | L | M | L | M | H | M | M | M | L | L | M | L | L | L | H | L | L | M | L | H | M | H | M | L | L | L | L | H | L | M | L | M | M | L | L | L | L | M | L |
| Invertebrate | M | M | M | M | M | H | H | H | L | H | L | M | M | H | L | M | L | M | L | M | L | L | L | L | L | L | L | L | M | L | L | M | L | L | L | L | M | L | L | L | M |
| Killie Fish | L | L | L | M | L | H | H | H | L | H | L | M | L | L | L | M | L | L | H | L | L | L | L | L | M | H | M | L | M | H | L | H | M | L | L | L | M | H | M | L | H |
| Knife Fish | M | M | M | M | M | M | M | M | H | M | L | M | M | M | M | M | M | M | L | M | L | L | M | L | M | M | M | M | M | H | M | M | M | M | H | M | M | M | M | M | H |
| Koi | L | L | L | L | L | L | L | M | L | L | L | L | L | L | H | L | L | L | L | L | H | L | L | L | L | L | L | L | L | M | L | L | L | L | L | L | L | L | L | L | M |
| Lake Malawi Cichlid | M | L | L | M | L | L | H | M | M | M | L | L | L | L | L | L | H | L | L | L | L | H | M | H | M | L | L | L | L | M | L | M | L | M | M | L | L | L | L | M | L |
| Lake Tanganyika Cichlid | M | M | L | M | L | M | H | M | H | M | L | L | M | L | L | M | M | L | L | M | L | M | H | M | M | L | L | L | L | M | M | M | M | M | H | L | M | M | M | M | L |
| Lake Victoria Cichlid | M | L | L | M | L | L | H | M | M | M | L | L | L | L | L | L | H | L | L | L | L | H | M | H | M | L | L | L | L | M | L | M | L | M | M | L | L | L | L | M | L |
| Loaches/Botia | H | H | M | H | H | H | H | M | M | H | L | H | H | M | M | H | M | L | M | M | L | M | M | M | M | H | H | M | H | H | H | H | H | H | M | M | H | H | H | M | H |
| Molly | H | H | H | H | H | H | H | M | H | H | L | H | H | H | M | H | L | L | H | M | L | L | L | L | H | H | M | L | H | H | H | H | H | H | H | L | M | H | H | M | H |
| Mono/Scat | H | M | M | H | L | M | M | M | H | M | L | L | H | L | L | H | L | L | M | M | L | L | L | L | H | M | H | L | M | H | H | M | M | H | H | M | M | H | M | M | M |
| Oscars | M | L | L | L | L | L | M | M | M | L | L | L | M | L | L | L | L | L | L | M | L | L | L | L | M | L | L | H | L | H | L | L | L | M | M | H | L | L | L | M | M |
| Platies/Variatus | M | H | H | H | H | H | H | M | H | H | L | H | H | H | M | H | L | M | M | M | L | L | L | L | H | H | M | L | H | H | M | H | H | H | H | L | M | H | H | M | H |
| Plecostomus | H | H | H | H | H | H | H | M | H | H | L | H | H | H | M | H | H | L | H | H | M | M | M | M | H | H | H | H | H | M | H | H | H | H | H | M | H | H | H | H | M |
| Puffers/Brackish (asst.) | H | M | L | M | L | M | M | M | H | H | L | M | H | M | L | H | L | L | L | M | L | L | M | L | H | H | H | L | M | H | M | H | H | H | H | L | M | H | M | M | H |
| Rainbowfish | H | H | H | M | H | H | H | M | H | H | L | H | H | M | L | H | M | M | H | M | L | M | M | M | H | H | M | L | H | H | H | H | H | H | H | L | H | H | H | M | H |
| Rasbora | H | H | H | H | H | H | H | M | H | H | L | H | H | H | M | H | L | L | M | M | L | L | M | L | H | H | M | L | H | H | H | H | H | H | H | L | H | H | H | M | H |
| Shark | H | H | M | H | M | H | H | M | H | H | L | H | H | L | M | H | M | L | L | M | L | M | M | M | H | H | H | M | H | H | H | H | H | H | H | M | H | H | H | H | H |
| South American (asst.) | H | H | L | H | H | H | H | M | H | H | L | M | M | L | M | H | M | L | L | H | L | M | H | M | M | H | H | M | H | H | H | H | H | H | H | M | H | H | M | H | M |
| South American Cichlid | M | L | L | M | L | M | M | M | M | L | L | L | M | L | L | M | L | L | L | M | L | L | L | L | M | L | M | H | L | M | L | L | L | M | M | H | H | L | L | M | M |
| S. American Cichlid (Dwarf) | H | H | H | H | M | H | H | M | H | H | H | H | H | L | M | H | L | M | M | M | H | H | M | L | H | M | M | L | M | H | M | H | H | H | H | H | H | M | M | M | H |
| Swordtail | H | H | H | H | M | H | H | M | H | H | L | H | H | L | M | H | L | L | H | M | L | L | M | L | H | H | H | L | H | H | H | H | H | H | H | L | M | H | H | H | H |
| Tetra | H | H | H | M | H | H | H | M | M | H | M | H | M | M | L | H | L | L | M | M | L | L | M | L | H | H | M | L | H | H | M | H | H | H | M | L | M | H | H | M | H |
| West African Cichlid | M | M | L | H | L | H | H | M | H | H | L | M | M | L | L | M | M | L | L | M | L | M | M | M | M | M | M | M | M | H | M | M | M | H | H | M | M | H | M | H | M |
| Plant | H | H | H | H | H | H | H | M | M | H | H | H | H | H | M | H | L | M | H | H | M | L | L | L | H | H | M | M | H | M | H | H | H | H | M | M | H | H | H | M | H |