I bought my Speedo weights from amazon.com. They were $25 with shipping but if you don't have the money or don't want to spend that much the cheap noodles can be good too. Anything that gives you resistance!
Basically I do this:
Jogging 60 secs
(Sometimes we go one way to make a "whirlpool" and then turn around to fight to current)
Bicep curls 60 secs
Jumping jacks 60 secs
Tricep extensions 60 secs
Reverse crunches 60 secs
(hold on to the edge of the pool & float a little on your back)
Lunges 60 secs on each leg
Shadow boxing with the weights 60 secs
Squats 60 secs
Repeat circuit 2-3 times
Water is great to exercise in! It is easy on your joints. I started exercising in the pool when I was at my heaviest and my first group exercise specialty certification was for water aerobics ;)
*As always, even in the pool you need to make sure you are drinking water to stay hydrated.
Do you like exercising in water? What is your favorite exercise to do in the pool?