There likely is such a thing but, they are not common. Typical sizes start at 12' round.
A 22-foot round pool that is 4 feet deep holds about 43,238.5 liters of water.
If the circumference of the round pool is 29 feet, then the volume of the pool (area times depth) is about 267.7 cubic feet.
It would be about 1.8535 feet deep.
About 17,950 gallons.
Three feet of water in a 12-foot round pool is about 2,550 gallons.
50
You should not put any Earth in your 18 foot round 5 foot deep pool. You should only put water and cleaners in the pool.
This pool can hold up to 1,689.7 gallons of water.
Twelve feet of water in a 10-foot round pool is approximately 7,080 gallons.
Here is a start. 1000 gal = 133.680 cubic feet/ for volume of a round pool...... remember Pi, 3.14?
6,200 gallons.
9,440 gallons.