KASS Mid-level Water IntakeThe KASS Mid level Water Intake is designed to: Give you more water flow for your Koi pond or water feature. Boost the filtration of your Koi pond or water feature. More water flow Adding a KASS will allow you to boost your flow rates of your pond system without having to add another bottom drain or skimmer. The KASS is installed in the middle third of your pond walls. Filter Connections The KASS can be connected to vortex chambers, RDF filters, Cetus