A large increase in algae is a typical symptom of a biological imbalance, often caused by an excess amount of nutrients. If algae spread too much, they damage the habitat of fish and plants. Algoshield effectively fights green algae and blue algae without using chemicals. It works with SpectroSorb – a technology that blocks certain UV wavelengths and prevents algae from photosynthesising. The beneficial combination of active substances keeps algae under control, thus supporting the biological and chemical balance of the pond.