Pool pump timers

[jeffyzf]

I have a pool with a Intermatic T10404R timer system, I just bought the house so I am not familiar with the equipment yet.

The previous owner had the main pump running from 10:00 am to 6:00 pm daily. Then there was a second dial I guess for the cleaner pump, running from like 10:00 am to 12:00 pm.

My question is I saw a video on Youtube that shows the most energy efficient way to run your pumps is 3, 1 hour blocks per day.

http://www.youtube.com/watch?v=ujK5fcAdVY0

I have a salt cell that I would imagine needs to run more than 3 hours a day. However, maybe I could run it for 2 1 hour blocks and then like 1 2-3 hour block. Any thoughts on if this is a better way to run the system or if 3-4 hours a day is enough?