Invigorating and Motivating Splash aquatic exercises are joint-friendly, total-body fitness fun.  The music and easy to follow vocal instructions give you the motivation to keep moving. This is a set of 2 CD's each workout is approximately 45 min. long and includes cardio, twists, breathing, stretching and a cool down.
All you need for these workouts are waist to chest deep water in a space that will allow you to kick in all directions.  
The exercises can be adapted for all fitness levels.  To make the workout more difficult you might consider aqua cuffs for the ankles and webbed gloves for arm resistance.  
These CD's can be used for working out on your own or with a group.
The audio  previews of these cds are available on Bandcamp.
For more variety in water workouts check out the following on eBay:
Energizing Splash
Funergetic Splash
Rejuvenating Splash