What's your D-1 filter cleaning cycle time?

[jeffn49]

I've got a D-1 Diplomat and the default setting for the daily filter cleaning cycle time is 180 minutes.  My wife and I use the tub about every evening for about 30 minutes, and our kids and their friends are occasional users, too. What's been others' experience with how long the filtering cycle should run on the D-1 system to be effective?

[wetone]

 We have the D1 Chairman II, use it just about daily 30 - 45 min. Filter cycle is set to 60 min and we always have clear water.