I use powerheads in all my planted tanks for circulation. It will make both your fish and plants happier. The plants get more distribution of Co2 and the fish have a small current. In my bigger tanks I even use more then one. I try and shoot for a circular flow that allows for a stronger area and a lower current area. But the flow still happens. It distributes the Co2 to the entire tank more fully.
Sun Sun pimp #72
RAOK CLUB # 68