I have a 25 meter pool with variable depth. Some of the stations are in the shallow some deep. It's a very simple class to set up with 10 stations around the pool. Move counterclockwise completing each station for 60 seconds. giving them 30 seconds. to move stations in a jog.
Using a whistle with one blow to change stations and two to begin the new is very helpful, especailly with indoor pool acoustics!
Have fun and happy splashing!