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.