Pool Analysis is done with shell finite elements.
Location of Pool Analysis Command
You can access the Pool Analysis command under the Analysis heading of the ribbon menu Analysis and Design tab .
Switch to the story you want to analyze the pool.
Click on the pool analysis icon under the Analysis Design icon.
The shell analysis option will appear.
Check or uncheck the Use alternate meshing algorithm option.
Click the OK button to continue the process.
The pool will be solved according to the finite element method on the studied story.
You can analyze the pool of each story separately by passing the other stories.