Millilitres (mL) would be the best metric measure for a cup of water.
Since water towers generally have a very large capacity, I would say that cubic meters might be the best bet. You can measure the total volumetric capacity of the water tower in cubic meters and then determine the volume of water that is currently in the water tower. However, an amount of water can also be measured in liters.
Probably millilitres or f the plant is a big plant maybe litres
mL, L, cm3, m3 are all SI units that can be used to measure the volume of water.
Cubic metres or litres.
The best unit of measure to use when measuring the amount of water in a drinking glass is ounces. A liquid measuring cup can be used to measure the ounces of water.
no its not but if you need to measure the volume of it you drop it in water and measure the amount of water displaced
A centimetre is probably best
Weigh the amount of water he can displace.