In the metric system:
In imperial units:
An acre-foot is the volume of one acre, one foot deep, so it is 43560 cubic feet.
cups
5ml
Millilitres would be the most appropriate measure.
A kilolitre or megalitre if a large pond.
The most reasonable unit to measure a fish pond would be square meters or square feet. This unit of measurement provides an accurate representation of the area of the pond, which is important for managing stocking densities and planning fish production.
Gallons
Which measure is most reasonable for the amount of liquid a bowl will hold
Centimetre.
A megabyte.
20 liters
The meter.
Centimeters.