Thanks for the reply, Dan Todd. I just got the clownfish yesterday. After putting him in the tank (with the powerhead on), I noticed that he wasn't really moving around too much so I decided to turn-off the power head, thinking it was too much for him. After I did that, it seemed he was moving and exploring around a bit more. Hmmm, I don't know. Maybe I was a bit impatient when I did that. I'll probably turn it on again and see how he does. Thanks again! Much appreciated.