Translations:Adventist Youth Honors Answer Book/Nature/Fishes/38/en
From Pathfinder Wiki
5. State briefly the proper care and feeding of fishes of:
a. Tropical zone
b. Temperate zone.
Ideal aquarium ecology reproduces the balance found in nature in the closed system of an aquarium. In practice it is virtually impossible to maintain a perfect balance. As an example, a balanced predator-prey relationship is nearly impossible to maintain in even the largest of aquaria. Typically, an aquarium keeper must take steps to maintain balance in the small ecosystem contained in his aquarium.
