Saw this on Craig's List (not mine) and thought I'd share:
http://sfbay.craigslist.org/eby/app/3586919587.html
Reportedly will make 200L (i.e., 53ga) of liquid vortex nicely.
http://sfbay.craigslist.org/eby/app/3586919587.html
Reportedly will make 200L (i.e., 53ga) of liquid vortex nicely.