Freshwater Fish Compatibility Chart: Avoid Incompatible Species
Veterinary & Aquatic Services Department, Drs. Foster & Smith

Tank mate compatibility is crucial to having a successful and healthy freshwater aquarium. Incompatible species will increase stress in the aquarium, which could result in disease and considerable loss. Use the chart below as a guideline before making your fish selection.

Remember, no guarantees can be made about the compatibility or incompatibility of any particular species of fish. Also, particular species within a group of fish vary in temperament and may not correspond with the guidelines below.

Freshwater fish compatibility chart

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