Hi everybody i am after some advice. I have taken on a pond that was here when i moved in. Its a pond with some koi and also other fish. Its about 30,000 ltrs. There is a Superfish eco plus 20,000 pump and a fishmate pressurised uv and bio 45000 filter. Everything seems to be working ok, all fish seem healthy and quite content but dont think there is quite enough filtration. Can i simply add another of the same type of filter straight after the existing filter in line or is it not that simple. I would appreciate any advice on how to increase filtration. Thanks. Unsy