- Kusuri Super C Special increases hygiene and breaks down organic waste accumulation in filter and pond systems. Kusuri Super C Special is a special blend of active enzymes and minerals formulated to break down harmful organic matter into inorganic matter that can then be flushed from filter systems and bottom drains. This allows more beneficial bacteria to populate the filter media helping reduce Ammonia and Nitrite. This keeps your filter system clean and efficient. Kusuri Super C Special complements Kusuri Klay and Kusuri Eco Pure – they are all chemical free products.