If the tank is the size of a swimming pool, then it will take longer than an aquarium. The dimensions of the tank are important to know.
To calculate the time to fill \( \frac{2}{3} \) of a tank with a flow rate of 6.5 liters per minute, use the formula: \( \text{Time} = \frac{\frac{2}{3} V}{6.5} \. \) Replace V with the total volume of the tank to get the specific time needed.
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