Yes, applied three 6 gallon containers of db-100 in a approx .75 acre pond. I didn't supplement with anything and seeing posts from people who did supplement got me wondering.

(All of the product was applied to the water)

5/23/09 (4 gallons) water mark @ 42.625
5/26/09 (8 gallons) water mark @ 41.5
6/20/09 (6 gallons) water mark @ 35.25

Shortly after the last application there was no longer any water at the toe of the dam. However, I'm thinking the reduction in pressure had something to do with it. Will know for sure when the water mark exceeds 40 inches. Water mark is currently at 29.0625.