I haven't tried one myself, and I realize your looking for hands on experience. but...
You probably have already done a search for the Carlson surge device.
Here's one link
http://petsforum.com/personal/trevor...ge_device.html
The Dana Riddle version uses a 5 gallon tank.
http://http://www.breedersregistry.o...mple_surge.htm
There's some info (8 pages) in The Reef Aquarium Vol.3. If you want to see it let me know.