Classica Super Grade Ceramic Rings are special grade ceramic rings that are made from exceptional raw material that has gone through high temperature treatment. This product is not the same as normal ceramic ring types and encompasses multi- functional purposes. It can be used to direct water flow in the filtration to spread the flow evenly. It also assists in efficient mechanical filtration purposes. Due to its high porosity nature and wide surface area, it is most ideal for beneficial bacteria growth (due to the high porous heat treated material). Tank water would be purified, stable and clean.