You may or may not care but I will post this for information to consider. The Jebao WP 25 and 40 are stolen designs from Tunze and produced in China where they can get away with the copywright infraction. Like I said you may or may not care about the ethics but don't expect the same build quality or support from Jebao and if saving a little short term money is not a concern check out the real thing from Tunze.
http://www.youtube.com/watch?v=p8-sYgiFyeA
Personally, I use Ecotech pumps. Fully controllable, low profile and produce a great wave.
http://www.youtube.com/watch?v=vSXNw-Koezc