My Balcony Koi Pond – Filter

The inner workings of my simple balcony koi pond filtration system. Filter size – 1′3″ (L) x 2′ (W) x 1′ (D). Filter is made up of only two chambers: 1st chamber consists of: 1 x PVC stand 2 x bio-filter foam mats 2 x mesh bag crushed corals 1 x mesh bag ceramic bio rings 2nd chamber consists of: 36 x bio balls 2 x japanese filter mats 50% water change is implemented once every two weeks. Filter is cleaned once a week due to its small capacity.