Lonewolfblue
Aquarium Advice Addict
I got a Rio 600, and it rattles. Could it be defective? On the box it says it's supposed to be silent running. When I have it in the middle of the tank it's fine, but when I get it to within an inch of the glass, it rattles. Also, when I restrict the output in any way, it rattles more. When I take the output off the powerhead so there's no restriction, it doesn't rattle. Is this common for Rio's? I also have an AquaClear Powerhead in my small tank, and it's dead silent.