Kilogram
Gallons (standard) or liters (metric).
A newton.
metric unit
Litres for a domestic aquarium, kilolitres for a large [public] aquarium.
Litre
cantaloupe
millimetres.
mL, L, cm3, m3 are all SI units that can be used to measure the volume of water.
its liters
Pints
Kilometers.
kilograms