Pond Algae Control
One of the biggest problems to do with garden ponds is the growth of algae. It is an unattractive substance that causes the water to look filthy and sometimes green. It can grow as a form of scum on the surface of pond water. Algae are a collection of microscopic plants containing chlorophyll that live floating on stagnant water. They look slimy and can ruin the look and feel of your pond eventually causing damage to aquatic wildlife. The most common types of algae that infect ponds are free-floating and suspended ones like string algae and the infamous plankton algae.
Causes of pond algae
How to control pond algae
Filtration and UV control
Types of pond filters
Submersible pond Filters
Submersible Pond Filters are commonly used on small ponds and water features. These types of filters sit on the bottom of the pond and filter the water internally. Water is drawn through submersible pond filters by a submersible pump, which can be attached to the filter either internally or externally, and than discharged into the pond.Pond filtration generally takes place through a replaceable mechanical filter pad and a permanent biological filter. These filters must be removed from the pond for maintenance and cleaning.
Pond filters – External gravity
In external gravity pond filters water is pumped from the pond or water feature into the filter, and than flows back into the pond by gravity. These filters must sit above the water level of the pond and are usually placed at the pond's edge. External gravity pond filters typically have a reusable/replaceable filter pad for mechanical filtration and permanent biological filter media. These pond filters are easily maintained and installed, and due to increased capacity for filter media, are generally more efficient and can handle larger debris loads than submersible pond filters. Some external gravity pond filters also incorporate ultraviolet (UV) sterilizers for further pond water clarification and algae removal.
Pond filters – External pressurized
External pressurized pond filters allow the greatest flexibility in locating your pond filter. Unlike other pond filters, these filters can be placed further away from your pond or can even be buried to hide them into your landscape. Basic pressurized pond filters consist of a sealed canister that is fed pond water through tubing from a pump. The water is then forced through a mechanical and biological filter media, than exits the filter and is returned to the pond. Some external pressurized pond filters also incorporate the use of ultraviolet (UV) sterilizers into their design to further clarify and eliminate algae from your pond's water. External pressurized pond filters can be used on both flexible liner and hard pre-form type ponds. A separate pond pump is required for operation.
Chemical control of algae
Chemically treating your pond with algaecides can help you effectively put an end to algae growth. The downside is the negative effect that algaecides can have on aquatic life. If you are planning to make use of algaecides, then you should ensure that your pond has proper filtration systems in place that can remove dead algae. In addition make sure your pond does not have aquatic plants and wildlife, as they can be severely affected by algaecides. Make sure to read instructions properly and buy only those algaecides that are approved.
An Integrated algae Management Approach: