KUSURI KLAY CALCIUM MONTMORILLONITE KLAY MINERALS A fine white powdered product that when added to any pond environment will replenish minerals in water. Using Kusuri Klay weekly in your pond will reap its own rewards as you will see better water clarity usually about 24 hours later, and better color and lustre on your Koi after a few weeks. Kusuri Klay also is a positive benefit to health as fish absorb minerals in large quantities from the water which helps bone & cellular growth. Dosage: Use 1 level cup (25 gms) as supplied (fixed to the inside lid of the container), to every 2500 liters of pond water. Place measured amount into a bucket of pond water and mix into a milky emulsion. Add slowly all around pond