Night mode - yay or nay?

[spedly]

I turn them down a little. During the day my powerheads pulse from 0-100% with some timed "storm modes" to stir up debris. At night I change the pulse to 0-90% and disable the storm modes. When I was in Mexico in February I noticed that the waves/current seemed to slow down a little at night. But like ComfortablyNumb said, not very much.