Pond Care and Algae Blockers

Plankton Algae

• Plankton algae is the most common type of algae found in lakes and ponds. If you notice a green, slimy substance floating on the top of the pond water, then you have a plankton algae problem. This type of algae can be incredibly difficult to get rid of. In order to effectively kill plankton algae, you'll need to remove the two things it thrives on: sunlight and organic nutrients. Tall plants with large leaves and small trees can be planted around your backyard pond to reduce the amount of direct sunlight that reaches the pond. Ornamental umbrellas or other shade structures can also be used to block sunlight in the pond. But in order to completely kill off the plankton algae, you'll need to get rid of the organic nutrients that it thrives on. Clean your backyard pond thoroughly, making sure to remove any grass, leaves or other debris. Also avoid over-feeding any fish in the pond as plankton algae thrive on leftover or decaying fish food.

String Algae

• String algae is much easier to remove than plankton algae, though it may not be as easy to notice. String algae typically resides at the bottom of a pond and around the edges and resembles green, stringy hair. The best way to remove string algae from a pond is to remove the fish and water, then spread a layer of Kosher salt on the pond's liner. Wait three days before thoroughly washing and rinsing the liner then replace the water and fish.

Plant Growth

• Some plants and flowers can complement a backyard pond nicely, such as rosebushes and ferns. However, some plants and flowers can also be hazardous or damaging, especially if stalks or leaves end up in your pond's filtration system. Monitor your pond regularly and remove any plants that may be floating in it. Use a skimmer to remove dead flowers, leaves and plants from the bottom of your pond as well.

Pond Filters

• Pond filters can also be used to keep the water in your pond clean and algae-free. These can be expensive, however, and require the use of a water pump as well. Maintenance is also necessary at least twice per year. This involves disconnecting the pump from its power source, removing the filter, disassembling the unit and power-washing every element. Any pieces that are damaged or worn out should be replaced. Filters are available in different sizes to accommodate small, medium and large ponds. Ponds can either use small submersible pumps or larger, external pumps.