The Pond Bug provides a bottom to top water sample collect. Collecting a water sample from the edge of your pond only provides results for that location.  Attach the Pond Bug to your fishing pole and cast it out across the pond. Allow it to sink to the bottom and slowly retrieve it to the surface. The unique characteristics of the foam allow the absorption of  water from different depths. The saturated Pond Bug is then placed in the  sample jar and mailing to the lab for analysis.