if you're talking about the dimensions, use meters. if you're talking about how much water the pool can hold, use liters or kiloliters.
The most reasonable would be yards. You could also use meters. It depends on how long the pool is.
gallons
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
millilitres
Weigh the amount of water he can displace.
The volume of water in liters or gallons is the best measure to describe the amount of water in a home aquarium. This measurement helps determine correct dosages for treatments, stocking levels for fish, and equipment needs such as filters and heaters.
Liters or gallons, depending if your in Canada or US
What measurements units would be best to measure the amount of wanter in and eye dropper
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.
Litres for a domestic aquarium, kilolitres for a large [public] aquarium.
25 yards by 50 meters
The Blueseventy!!!