-The indication and benifits of the Cauarina Cone are similar to those of Alder Cones. -Will release tannins into the water that produces a mild antibacterial and fungicidal effect. -These tannins also facilitates molting of shrimps. -Contain a lot of humic acids -Aid in lowering ph. -The Bio-film that accumulate on the cone is a great food source for shrimp. -Instructions: Add boiling water and soak till water logged. Rinse! Add 1-2 Cones for every 5l and then add more over a period of time.