Algae in the pond: Causes and solutions

Algae in the pond are a common problem for pond owners who want clear water and healthy plants. Instead, the pond can quickly turn into a murky body of water in which fish are only visible near the surface. This phenomenon occurs not only in garden ponds, but also in swimming ponds and reduces the enjoyment of swimming in the pond. The causes are varied: unsuitable pH level, too many or too few plants, as well as incorrect fish stocking or feeding quantity.

Ponds require intensive care

A self-regulating pond that remains in balance is difficult to achieve and requires intensive care. Special pond plants can help combat algae in the pond, as can regular cleaning of the filters. The use of chemicals is not recommended, as they can affect the entire ecosystem of the pond. Without a natural inflow of fresh water, such as from a stream, the oxygen supply and water circulation must be ensured in another way. A fountain with integrated filter pads can help here, although cleaning the filters is often cumbersome and ineffective against suspended algae, blue-green algae, or filamentous algae.

Algae in the pond: Effective pond cleaning with UV-C light

An effective method for preventing algae blooms is UV-C disinfection. In this process, the water is pumped through an external circuit that contains a UV-C lamp. This lamp destroys the DNA of the algae cells, preventing them from reproducing and causing them to die off. An upstream suspended solids or sand filter removes the dead material from the water. This process protects plants and fish while keeping the pond water clear and clean.