Rainwater tanks always manage to get full of dust and sediment, if the worst of this isn’t removed then the filters for controlling bacteria will clog up very quickly. The nice thing with the initial sediment filtration is that you can use a washable filter such as a disc filter this greatly reduces the overall running cost of the system. If you want to feed in stormwater or you just know that you will get a lot of dirt into your tanks you can also use the larger automatic AFM Filter Vessels.
AFM® Activated Filter Media is a direct replacement for sand, doubling the performance of sand filters without the need for additional investments in infrastructure. AFM® resists biofouling, bio coagulation and transient wormhole channeling of unfiltered water and never needs to be recharged or replaced.