HEISSNER Flow filtration set FPU24000-00

The pump at the filtration should run continuously. If the pump operation is interrupted, the bacteria settled in the filter inserts, which serve for biological cleaning of the pond, will die. A constant supply of oxygen and irrigation is needed. Here, the emphasis is always on low consumption of the pond pump. Conversely, the UV lamp should not run 24 hours a day to avoid killing even the bacteria we need for biological cleaning.
In the months from May to September we recommend switching on the UV lamp according to the degree of water pollution (visibility) - 20 cm for 24 hours, 60 cm for 10 hours, 30 cm for 22 hours, 70 cm for 5 hours, 40 cm for 20 hours, 80 cm for 3 hours, 50 cm for 15 hours, > 80 cm - switch off.
From October to April, UV lamp operation is generally not required. When using the UV lamp for the first time, switch it on max. for 4 h per day to prevent rapid oxygen depletion in the water caused by algae death. Approximately 1 W of UV lamp power is calculated per 1000 l of water volume. When choosing a filtration system, not only pay attention to the volume of water in the pond, but if you plan to fish you must double the volume. Important rule: The maximum number of fish is determined by the sum of their lengths; 20 cm of fish per 1000 l of water is recommended.