nwaas.com

It seems like there was a discussion recently about setting up water current for hillstream loaches, darters, or some other fishes that like strong current along the bottom. I see there is a new style "gyre" device you can get that creates laminar flow along the top that circles along the bottom. It might be a good choice for such a setup:

http://www.food4fish.co.uk/lighting/product.php?n=gyre&i=8

After looking into these just for fun, think I'll pass at $200+

Ouch! I didn't realize they were that expensive.