The pond pump up to 3000 l/h with 40 Watt is one of the most efficient pumps on the pond market. If we compare the energy consumption of the CTF series with that of other pond pumps, it can be seen that the desire to save energy has been recognized and that adequate measures have been taken. Pond pumps are continuously running devices, so every watt that can be saved counts and positively influences your budget. Example calculation: A consumption of 5 watts less corresponds to 43.8 kWh less per year, and you know your electricity price. watercourse / Fountain pump / Filter pump: To prevent your pond filter from overflowing if you use it with these powerful pumps, we recommend that you use a connector in Y. Used as a bypass, you can also supply a watercourse or distribute the power to an additional UVC or pond filter. The flow capacity of the pond pump must absolutely be adapted to the size of the pond filter. Too high a flow rate of the pond pump should be avoided at all costs, as this will cause the pond filter to overflow. Consideration should absolutely be given to the circulation cycles of the pond and the retention time of the pond water in the pond filter. Depending on the mode of use, the ideal circulation cycle depends on various factors: fish population, aquatic plants, sunlight and desired water clarity. Of course, and where appropriate, other components of the filter circuit must be tuned.