sissy - that's quite a lot of air, and a heck of a good price! Let us know how it works out for you. Yeah that's one reason I like to have a waterfall - free oxygenation. It is rather loud though, so I may have to play around with the setup and see if I can reduce the noise a bit. Maybe get more of the water running down the wall, instead of just shooting out.
j.w - another good thing about having so many pictures, I don't have to remember where I buried all the pipes!
fishin - thanks, I'm really happy with how its turning out. I don't have too much more work before I can start replanting everything around the edges of the pond, and the moneywort takes off fast so I should have some good ground-cover by the end of this Summer.