puckbs - I like the nano. I have a "garden reef" with a mix of SPS, LPS and softies. I have the nano on one side and some smaller powerheads on the other so I'm not tearing my frogspawn or irritating my shrooms. However, I also have 2 Aquaclears running with chemipure/phosban. If I didn't have softies I'd probably use 2 of the nanos and reposition the LPS.