if you were to fill it to the brim, about 13-15 gallons.
615,142 gallons of water are needed to fill this cylinder.
To fill this pool to the very top you'll need about 1,480 gallons of water - less if you do not fill it all the way up.
10 gallons of water are needed.
2,005 gallons of water are needed.
To fill this pool to a depth of four feet you will need about 7,646 gallons of water. If you decide to fill it to three feet deep, the gallons decreases to around 5,735.
About 3,493.4 US gallons of water are required to fill a volume of 467 cubic feet.
Assuming the only thing in the aquarium is water, this tank could hold up to 19.8 gallons of water.
72 gallons is needed to fill the tank.
To fill your 18-foot round pool to a depth of 48" would require about 7,646 gallons of water. If you filled it to 36", the total would decrease to about 5,735 gallons.