For unicellular (planktonic) algae, what application method is described?

• A. Dissolve and spray onto mats.
• B. Dragging burlap bag with crystals through water.
• C. Inject into water near the bottom.
• D. Apply as a pellet on the surface.

Answer: (B)

For unicellular planktonic algae, you want the algaecide distributed throughout the water column so the suspended cells are contacted wherever they drift. Dragging a burlap bag filled with crystals through the water achieves broad distribution as you move, helping the product dissolve and reach the algae across a wide volume. This contrasts with surface-only or bottom-targeted methods, which either treat only surface films or miss the suspended cells in the water column. So the best method is the moving burlap bag approach because it provides uniform exposure to the planktonic algae.