How much does it cost to care for a pet fish?

The cost of caring for a pet fish can vary widely depending on the species, tank size, and equipment needed. On average, initial setup costs, including the aquarium, filter, heater, and decorations, can range from $100 to $500. Monthly expenses for food, water treatments, and maintenance typically add up to $10 to $30. Overall, the annual cost can range from a few hundred to over a thousand dollars, depending on the complexity of the setup and the type of fish.