powerhead. After an outbreak of ich in my tank, I've got the heat cranked up to kill the ich and wanted to provide some extra aeration for the fish. I had heard good things about these powerheads and decided to give this one a try. I have a freshwater tank. So, I wasn't looking for a whole lot of circulation, just something to break up the dead spot in the corner opposite my HOB filter and disturb the surface of the water.
The instructions that come with it are minimal, but there is a video on Hydor's website that helps. It's actually pretty self-explanatory. The instruction sheet shows "assembly, but it comes fully assembled except you have to snap the ball into the ball and socket joint made between the pump and the suction cup/magnet that holds it. The suction cup/magnet assembly is ingenious. Trying to get suction cups to stick can sometimes be a pain and then once you get them on, it's hard to move them. The second piece on the outside of the tank gives you a handle that you can use to maneuver the device into place. Just get it on the wall you want it on, then grab the outside handle and slide it into place. Also, should the suction cups wear out, the magnet will last forever.
I like that it's timer compatible. I've set mine to come on with the lights and go off after the lights go off so the fish are assured of being undisturbed during sleeping times. I have used air pumps for increased aeration on other tanks. This is more quiet than the quietest air pump I've found (I've tried two brands) and does a nice job of disturbing the surface of the water and creating flow at the same time.
According to the recommendations this pump is undersized for my 40 gallon tank, but since it's a freshwater tank I don't think I need or would want any more flow.
I just installed it, so of course, I have no idea how durable it will be but it's a simple design. I expect it'll run just fine for a while.