My pond (about 7 m3) is because I also initiating the rainwater from the roof, very loaded with nutrients. The water had by the algae so a lush green color (after about 10 cm immersion depth was hard to see anything else). Through restocking I had decided a number to choose greater than it would have been necessary because of the size of pond filter. Success came faster than expected one. After only three weeks could be the reason and the fish seen in about 1 m depth (in the clear water guarantee up to 6 weeks are given). Overall, the filter system is easy to set up. The filter sponges can be easily off and installing for cleaning. Since I have installed the filter system toward water outlet inclined slightly (about 2% - 3%), I would have the caseback with a slightly larger counter slope (so that the dirty water after cleaning is faster) or the purging outlet desired on the side of the water outlet , Overall I am very satisfied with the pond filter BioSmart Set 14000 and would certainly Recommend by pointing out right at the purchase of the water flow with the appropriate port (70 mm diameter are not common for drainage pipes).