Rick,
We do not believe in the old "turnover" myth.. It is just not true.. You can run your pool for as long, or as little as you like, it is your pool. But you should never run it just to meet some mythical turnover number.
Here at TFP we run our pumps for a reason.. To generate chlorine, or to run our skimmers, or run some water feature... All good reasons.. Turnovers, not so much.
Your filter is there to capture things that fall into your pool. It is not there to prevent algae, that is a job for the chemicals. We have people here that run their pump for just a couple of hours per day and others that run 24/7... In all cases, if you don't keep chlorine in your pool you will get algae, no matter how many turnovers you have.
Thanks,
Jim R.