When is it most practical to treat the bottom 1' to 3' of water?

Treating the bottom 1' to 3' of water is particularly practical in deep lakes where it is challenging to treat the entire volume of water. This approach allows for targeted management in zones where pests or unwanted aquatic vegetation are concentrated without the logistical difficulties presented by the depth of the water body. In deeper lakes, applying treatment to the upper layers or the entire volume can lead to excessive amounts of chemical use, increased costs, and potential environmental impacts.

The focus on just a portion of the water column can effectively manage issues like algae or invasive species while minimizing disturbance to other aquatic organisms and maintaining the overall balance of the ecosystem. This means that addressing the bottom layers is a strategic decision based on effectiveness and practicality, given the conditions in deep lakes. Other options, such as treating shallow ponds or addressing visible algae blooms, may not consider the specific circumstances of deep water bodies effectively.