My PB installed an Intermatic timer with Freeze Protection. It's a fairly basic model but does the job. I can't imagine what it would be like to not have a timer. While I can't tell you how long you'll need to run your pool equipment to ensure a turnover or two, I CAN tell you it won't be 24/7! So, your electric bills should be appreciably less than last summer.

My pool's currently on 7 hours and that may be a bit much, considering it's only mid-70's to 80 degrees with 68 degree water. I know I'm turning over the pool at least once, but there's so darn much pollen, spend flower buds, dirt, etc. in the air (and, therefore, in my pool) that I need to keep the water circulated.

One thing I'd do differently is to put the Polaris cleaner on its own timer, slave to the main timer. There may actually be a different Intermatic model that can do this. If you have an automatic cleaner with a booster pump, you might want to consider that.