Very large drum filter for my 100 cubic metre pond. The photo shows how effective the 60 micron sieves are at cleaning the water. The pond is well established but was running with an inadequately sized pressure filter. This new drum filter looks like it will very effective in cleaning up the pond. The automatic self-cleaning drum will make looking after the pond so much easier than cleaning horrible green sponges. in my old filter. The picture shows the pond water before filtration compared with the waste discharge water washed off the sieves and discharged to waste.