Pond Boss Forums AQUATIC VEGETATION Controlling unwanted plants Close up of Plankton bloom?

Sonar and similar brand products are not algaecides.

LovLivin - the bluegreens you were typically seeing in the 16000ac lake were likely a different species of Cyanobacteria. Your particular species is one that characteristically looks like various sizes of grass clippings in the water.

Check out information on the web for more details for your genus Aphanizomenon. Often some cyanobacteria, can regulate their buoyancy in response to available light. Microcystis is a good example of one that does this. This characteristic allows cyanobacteria to migrate up and down even through thermal gradients and use nutrients confined to cooler deeper water below. Buoyancy is controlled mainly through the production of carbohydrates from photosynthesis. This control mechanism breaks down if there is too little carbon dioxide available. Although buoyancy cannot be adjusted during the night, the organisms will usually float to the surface because of their reduced carbohydrate content as a result of respiration (oxygen consumption) at night.

The boat motor technique can help disperse and break up FA mats and cause them to sink. Nutrient conditions often cause reoccurring FA development. Another very good benefit of the wake from a boat motor is bottom sediment oxygenation from wave action on the shoreline and the near shore bottom areas.