I just replaced my Tunze Stream 6101 with a Vortech MP40W. You can see the wave action with it on pulse mode. With the Tunze controller I wasn't able to get this much waves. Definitely the Tunze is much quieter than that Vortech in pulse mode or at full power. You can hear the hmming the Vortech makes in pulse mode. But in continuous mode setting below 3/4 power setting is quiet. Overall I like it because of the small size of the Vortech compared to the Tunze. If you can stand the hmmming or if your tank is an in-wall then this is a great powerhead. For me I need all the space I can get plus I think my skimmer makes more noise than the Vortech. Enjoy the video.
http://www.youtube.com/watch?v=gFsLUUBryro
http://www.youtube.com/watch?v=gFsLUUBryro


