At this price, WHAT A BARGAIN !
More than $US3.8 billion have been plowed into water initiatives in China since 2001, which STILL haven't cleaned up Dianchi.
Dianchi lake is huge, and will keep IMH busy for many years to come.
I see Phoslock as pretty much the only tech that will clean Dianchi at present, pretty substantial given that China have to clean up their act before 2008.