It may seem like a lot of flow if you look at it that way. I'm sure I'll have to change things once I start adding softies and LPS
I'm only basing my settings right now on the amount of snail poop that settles on the sand
Until you make your mind up about buying some, you could ask around if someone would let you see their's running
They way mine are set right now, they pulse left - right - left - right
It's about a 3/4 second pulse each side, back and forth. This creates the wave. On the setting I'm currently using, they run this way for about 1/2hr or so, then there's a big surge. It's supposed to mix everything up and then flush it out the overflow
BTW, every tank is different, so where you start off with them placement-wise is up to you
I just raised mine back up closer to the top by about an inch as I didn't like the dust that was collecting on the surface in some areas
I'm still going to have to fool around with them until I'm happy