The question cannot be answered with the information given. It is necessary to know the length and width of the pool as as as whether or not the depth increases steadily.
Go to http://www.havuz.org/pool-calculators.htm
25000 gallons
It can be shallow or deep.
24,685.79 gallons
If the pool is 8 feet in the deep end and 3 feet in the shallow end, the total volume will be about 38,507 gallons of water.
20000
there is 2,025.876 cubic Ft = 15,154.6 gallons, 1 cubic Ft = 7.48059 gallons
You need more information. But, let's assume the pool is 8 feet deep at the deep end and 3 feet at the shallow end. If the pool is rectangular, the total volume will be 28,798 gallons of water.
Shallow water is more dense than Deep water. This means that a wave travelling from deep water to shallow water would bend towards the normal. Also, the wave would travel slower in the shallow than in the deep water
If the pool is 8 feet in the deep end and 3 feet in the shallow end, the total volume will be about 21,722 gallons of water.
there is more animal life in deep and shallow water.
Seahorses tend to like Shallow Waters More than Deep Waters