What materials are needed to build a pool?

[Xme]

I?m trying to save my materials, I?m currently building a level 5 skatepark. I can?t see what I need for the pool yet though, can someone tell me please?

 

[SierraSigma]

30 sporty essence, 20 natural essence, 100 steel.

Times five.

 

[Xme]

30 sporty essence, 20 natural essence, 100 steel.

Times five.

Thank you!!!!