would a fish not like water current? It isnt noise, because it is a smaller powerhead. But as soon as I turn the powerhead on, the fish DARTS back into the caves. Without it on, the thing will swim all over the tank.
Not that you knew because I did not mention it, but the clownfish dont care about the powerhead, it is a brand new powerhead and I have a grounding probe. So I dont think it would be that. The clownfish are already hosting the thing for some odd reason.